### SAMP

> SAMP is a messaging protocol that enables astronomy software tools to interoperate and communicate. Broadly speaking, SAMP is an abstract framework for loosely-coupled, asynchronous, RPC-like and/or event-based communication, based on a central service providing multi-directional publish/subscribe message brokering. The message semantics are extensible and use structured but weakly-typed data. For more information on SAMP, please click here.

> The samp implementation for DS9 is based on the XPA model with 2 private calls:

> `ds9.get
> Arguments
> cmd (string) required
> url (string) optional
> Returned value
> OK (samp.result map)
> value (string) optional
> url (string) optional
> ERROR (samp.error map)
> samp.errortxt (string)
> ds9.set
> Arguments
> cmd (string) required
> url (string) optional
> Returned value
> OK
> ERROR (samp.error map)
> samp.errortxt (string)
> `

> `ds9.set` maybe called via notification, call and call/wait. `ds9.get` can only be called via call and call/wait. Most of the `ds9.get` calls return a value string, but a few will return a url instead.

> `2mass
> 3d
> about
> analysis
> array
> background
> backup
> bin
> blink
> catalog
> cd
> cmap
> colorbar
> console
> contour
> crop
> crosshair
> cube
> cursor
> data
> dsssao
> dsseso
> dssstsci
> envi
> exit
> export
> file
> fits
> frame
> gif
> grid
> header
> height
> iconify
> iis
> image
> imexam
> jpeg
> lock
> lower
> magnifier
> mask
> match
> mecube
> minmax
> mode
> mosaic
> mosaicimage
> movie
> multiframe
> nameserver
> nan
> nrrd
> nvss
> orient
> pagesetup
> pan
> pixeltable
> plot
> png
> prefs
> preserve
> psprint
> print
> quit
> raise
> regions
> restore
> rgb
> rgbarray
> rgbcube
> rgbimage
> rotate
> save
> saveimage
> scale
> shm
> single
> skyview
> sleep
> smooth
> source
> theme
> threads
> tcl
> tiff
> tile
> update
> url
> version
> view
> vla
> vo
> wcs
> web
> width
> zscale
> zoom
> `

> 2mass

> Support for 2MASS Digital Sky Survey.

> `Syntax:
> 2mass []
> [<object>]
> [name <object>]
> [coord <ra> <dec> degrees|sexagesimal] # in wcs fk5
> [size <width> <height> degrees|arcmin|arcsec]
> [save yes|no]
> [frame new|current]
> [update frame|crosshair]
> [survey j|h|k]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> 2mass name
> 2mass coord
> 2mass size
> 2mass save
> 2mass frame
> 2mass survey
> ds9.set(string cmd)
> 2mass
> 2mass m31
> 2mass name m31
> 2mass coord 00:42:44.404 +41:16:08.78 sexagesimal
> 2mass size 60 60 arcmin
> 2mass save yes
> 2mass frame current
> 2mass update frame
> 2mass survey j
> 2mass open
> 2mass close
> `

> 3d

> Support for 3D frame.

> `Syntax:
> ` `3d []
> [vp <az> <el>]
> [az <az>]
> [el <el>]
> [scale <scale>]
> [method mip|aip]`
> ``[background none|azimuth|elevation]
> `` `[border yes|no]
> [border color <color>]
> ` `[highlite yes|no]
> [hightlite color <color>]
> ` `[open|close]``
> Example:
> string value = ds9.get(string cmd)
> ` `3d vp
> 3d az
> 3d el
> 3d scale
> 3d method`
> `3d background
> ` `3d border
> 3d border color
> ` `` `3d highlite
> 3d highlite color
> ` `ds9.set(string cmd)
> ` `3d # create new 3D frame
> 3d vp 45 30
> 3d az 45
> 3d el 30
> 3d scale 10
> 3d method mip`
> `3d background azimuth
> ` `3d border yes
> 3d border color red
> ` `3d highlite yes
> 3d highlite color red
> 3d open
> 3d close`

> about

> Get DS9 credits.

> `Syntax:
> about
> Example:
> string value = ds9.get(string cmd)
> about
> `

> align

> Controls the World Coordinate System alignment for the current frame.

> `Syntax:
> align []
> [yes|no]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` align
> ` ``ds9.set(string cmd)
> ` align yes`

> analysis

> Control external analysis tasks. Tasks are numbered as they are loaded, starting with 0. Can also be used to display a message and display text in the text dialog window.

> `Syntax:
> analysis [<task number>]
> [<filename>]
> [task <task number>|<task name>]
> [load <filename>]
> [clear]
> [clear][load <filename>]
> [message ok|okcancel|yesno <message>]
> [entry <message>]
> [text]
> Example:
> string value = ds9.get(string cmd)
> analysis
> analysis task
> analysis entry Please enter something
> analysis entry okcancel Please enter something
> ds9.set(string cmd)
> analysis 0 # invoke first analysis task
> analysis task 0
> analysis task foobar
> analysis task {foo bar}
> analysis my.ans
> analysis load my.ans
> analysis clear
> analysis clear load my.ans
> analysis message ok {This is a message}
> analysis text {this is text}
> ds9.set(string cmd, string url)
> analysis load
> analysis text`

> array

> Load raw data array into current frame.

> `Syntax:
> array [native|big|little]
> array [new|mask] [[xdim=<x>,ydim=<y>|dim=<dim>],zdim=<z>,bitpix=<b>,skip=<s>,endian=[little|big]]
> Example:
> ` ``string url = ds9.get(string cmd)
> ` array
> array little
> ` ``ds9.set(string command, string url)
> ` array foo.arr[dim=512,bitpix=-32,endian=little]
> array new foo.arr[dim=512,bitpix=``-32,endian=little]`
> ``array mask foo.arr[dim=512,bitpix=```-32,endian=little]``
> `

> bg
> background

> Set image background color.

> `Syntax:
> bg <color>
> Example:
> ` `string url = ds9.get(string cmd)``
> bg
> ` `ds9.set(string cmd)
> ` `bg red``
> `bg red``

> backup

> Create a backup save set.

> `Syntax:
> backup <filename>
> Example:
> ` `ds9.set(string cmd)
> ` `backup ds9.bck`

> bin

> Controls binning factor, binning buffer size, and binning function for binning FITS bin tables. The access point blocking is provided for backward compatibility.

> `Syntax:
> bin [about <x> <y>]
> [about center]
> [buffersize <value>]
> [cols <x> <y>]
> [colsz <x> <y> <z>]
> [factor <value> [<vector>]]
> [depth <value>]
> [filter <string>]
> [function average|sum]
> [to fit]
> [match]
> [lock [yes|no]]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> bin about
> bin buffersize
> bin cols
> bin factor
> bin depth
> bin filter
> bin function
> bin smooth
> bin smooth function
> bin smooth radius
> bin lock
> ds9.set(string cmd)
> bin about 4096 4096
> bin about center
> bin buffersize 512
> bin cols detx dety
> bin colsz detx dety time
> bin factor 4
> bin factor 4 2
> bin depth 10
> bin filter {pha > 5}
> bin filter {}
> bin function sum
> bin to fit
> bin match
> bin lock yes
> bin open
> bin close
> `

> blink

> Blink mode parameters. Interval is in seconds.

> `Syntax:
> blink []
> [yes|no]
> [interval <value>]
> Example:
> string value = ds9.get(string cmd)
> blink
> blink interval
> ds9.set(string cmd)
> blink
> blink yes
> blink interval 1
> `

> catalog
> cat

> Support for catalogs. The first three commands will create a new catalog search. All other commands operated on the last search created, unless indicated otherwise.

> `Syntax:
> ` `catalog []
> [ned|simbad|denis|skybot]
> [ascss|cmc|gsc1|gsc2|gsc3|ac|nomad|ppmx|sao|sdss5|sdss6|``sdss7|sdss8|``tycho|ua2|ub1|ucac2]
> [2mass|iras]
> [csc|xmm|rosat]
> [first|nvss]
> [chandralog|cfhtlog|esolog|stlog|xmmlog]
> [cds <catalogname>]
> [cds <catalogid>]
> [load <filename>]
> [import sb|tsv <filename>]
> ` `[<ref>] [allcols]
> ` `` `[<ref>] [allrows]
> ` `[<ref>] [cancel]
> ` `[<ref>] [clear]
> ` `[<ref>] [close]`
> `[<ref>] [coordinate <ra> <dec> <coordsys>]``
> ` `` `[<ref>] [crosshair]`
> `[<ref>] [dec <col>]`
> `[<ref>] [edit yes|no]`
> `[<ref>] [export sb|tsv <filename>]
> ` `[<ref>] [filter <string>]
> [<ref>] [filter load <filename>]`
> `[<ref>] [header]`
> `[<ref>] [hide]`
> `[<ref>] [location <code>]`
> `[<ref>] [match <ref> <ref>]
> ` `[<ref>] [match error <value> degrees|arcmin|arcsec]`
> `` `[<ref>] [match function 1and2|1not2|2not1]
> ` `` `[<ref>] [match return 1and2|1only|2only]`
> `` `[<ref>] [match unique yes|no]`
> `[<ref>] [maxrows <number>]`
> `[<ref>] [name <object>]
> ` `[<ref>] [panto yes|no]`
> `[<ref>] [plot <xcol> <ycol> <xerrcol> <yerrcol>]`
> `[<ref>] [print]`
> `[<ref>] [psky <skyframe>]`
> `[<ref>] [psystem <coordsys>]`
> `[<ref>] [ra <col>]`
> `[<ref>] [regions]`
> `` ``[<ref>] [retrieve]`
> `` [<ref>] [samp]
> [<ref>] [samp broadcast]
> [<ref>] [samp send <application>]``
> ` `[<ref>] [save <filename>]`
> `[<ref>] [server cds|sao|cadc|adac|iucaa|bejing|cambridge|ukirt]`
> `[<ref>] [show]`
> `[<ref>] [size <width> <height> degrees|arcmin|arcsec]`
> `` `[<ref>] [sky <skyframe>]
> ` `[<ref>] [skyformat <skyformat>]
> ` `[<ref>] [sort <col> incr|decr]`
> `[<ref>] [symbol [#] condition|shape|color|text|font|fontsize|fontweight|fontslant <value>]
> ` `[<ref>] [symbol [#] text|size|size2|units|angle <value>]
> ` `[<ref>] [symbol shape {circle point}|{box point}|{diamond point}|
> {cross point}|{x point}|{arrow point}|{boxcircle point}|
> circle|ellipse|box|text]
> [<ref>] [symbol add| [#] remove]
> [<ref>] [symbol save|load <filename>]`
> `[<ref>] [system <coordsys>]``
> ` `` `[<ref>] [update]`
> `[<ref>] [x <col>]`
> `[<ref>] [y <col>]`
> `
> Example:
> string value = ds9.get(string cmd)
> catalog
> catalog header
> ds9.set(string cmd)
> ` `catalog
> catalog 2mass
> catalog cds 2mass
> catalog cds` `{I/252}`
> `
> ` `catalog load foo.xml
> catalog import tsv foo.tsv
> ` `catalog allrows
> catalog allcols
> ` `catalog cancel
> ` `catalog clear
> ` `catalog close
> ` `catalog coordinate 202.48 47.21 fk5
> ` `catalog crosshair
> ` `catalog dec DEC
> ` `catalog edit yes
> ` `catalog export tsv bar.tsv
> ` `catalog filter {$Jmag>10}
> catalog filter load foo.flt
> catalog header
> ` `catalog hide
> ` `catalog location 500`
> `catalog match error 2 arcsec
> catalog match function 1and2
> catalog match unique no
> catalog match return 1only
> catalog match 2mass csc
> ` `catalog maxrows 2000
> ` `catalog name m51
> catalog panto no
> ` `catalog plot` `{$Jmag} {$Hmag} {$e_Jmag} {$e_Hmag}``
> ` `catalog print`
> `catalog psky fk5`
> `catalog psystem wcs`
> `catalog ra RA`
> `catalog regions
> ` `catalog retrieve
> ` `` `catalog samp broadcast
> catalog samp send aladin
> catalog save foo.xml
> ` `catalog server sao
> ` `catalog show`
> `catalog size 1 1 degrees`
> `catalog symbol condition` `{$Jmag>15}`
> `catalog symbol 2 shape` `{boxcircle point}`
> `catalog symbol color red
> catalog symbol font times
> ` `catalog symbol fontsize 14
> ` `catalog symbol fontweight bold
> ` `catalog symbol fontslant italic
> ` `catalog symbol add
> catalog symbol 2 remove
> catalog symbol load foo.sym
> catalog symbol save bar.sym``
> catalog sky fk5
> catalog skyformat degrees
> ` `catalog sort {Jmag} incr
> ` `catalog system wcs``
> ` `catalog update
> ` `catalog x RA
> catalog y DEC`

> cd

> Sets/Returns the current working directory.

> `Syntax:
> cd [<directory>]
> Example:
> string value = ds9.get(string cmd)
> cd
> ds9.set(string cmd)
> cd /home/mrbill
> `

> cmap

> Controls the colormap for the current frame. The colormap name is not case sensitive. A valid contrast value is from 0 to 10 and bias value from 0 to 1.

> `Syntax:
> cmap [<colormap>]
> [file]
> [load <filename>]
> [save <filename>]
> [invert yes|no]
> [value <constrast> <bias>]
> ` `[tag [load|save] <filename>]
> [tag delete]`
> `[match]
> [lock [yes|no]]`
> `[open|close]
> Example:
> string value = ds9.get(string cmd)
> cmap
> cmap file
> cmap invert
> cmap value
> ` `cmap lock`
> `ds9.set(string cmd)
> cmap Heat
> cmap load foo.sao
> cmap save bar.sao
> cmap invert yes
> cmap value 5 .5
> ` `cmap tag load foo.tag
> cmap tag save foo.tag
> cmap tag delete`
> `cmap match
> cmap lock yes`
> `cmap open
> cmap close
> `

> colorbar

> Controls colorbar parameters.

> `Syntax:
> colorbar []
> [yes|no]
> [horizontal|vertical]
> [orientation horizontal|vertical]
> [numerics yes|no]
> [space value|distance]
> [font times|helvetica|courier]
> [fontsize <value>]
> [fontweight normal|bold]
> [fontslant roman|italic]
> [size]
> [ticks]
> Example:
> string value = ds9.get(string cmd)
> colorbar
> colorbar orientation
> colorbar numerics
> colorbar space
> colorbar font
> colorbar fontsize
> colorbar fontweight
> colorbar fontslant
> colorbar size
> colorbar ticks
> ds9.set(string cmd)
> colorbar yes
> colorbar vertical
> colorbar orientation vertical
> colorbar numerics yes
> colorbar space value
> colorbar font times
> colorbar fontsize 14
> colorbar fontwieght bold
> colorbar fontslant italic
> colorbar size 20
> colorbar ticks 11
> `

> console

> Display tcl console window.

> `Syntax:
> -console
> Example:
> ds9.set(string cmd)
> console
> `

> contour

> Controls contours in the current frame.

> `Syntax:
> contour []
> [yes|no]
> [<coordsys> [<skyframe>]]
> [clear]
> [generate]
> [load <filename> <coordsys> <skyframe> <color> <width> yes|no]
> [save <filename> <coordsys> <skyframe>]
> [convert]
> [loadlevels <filename>]
> [savelevels <filename>]
> [copy]
> [paste <coordsys> <color> <width> yes|no]
> [color <color>]
> [width <width>]
> [dash yes|no]
> [smooth <smooth>]
> [method block|smooth]
> [nlevels <number of levels>]
> [scale linear|log|pow|squared|sqrt|asinh|sinh|histequ]
> ]scale log exp <value>]
> [mode minmax|<value>|zscale|zmax]
> [limits <min> <max>]
> [levels <value value value...>]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> contour
> contour color
> contour width
> contour dash
> contour smooth
> contour method
> contour nlevels
> contour scale
> contour log exp
> contour mode
> contour limits
> contour levels
> string url = ds9.get(string cmd)
> contour wcs fk5
> ds9.set(string cmd)
> contour
> contour yes
> contour clear
> contour generate
> contour load ds9.con wcs fk5 yellow 2 no # solid line
> contour load ds9.con wcs fk5 red 2 yes # dashed line
> contour save ds9.con wcs fk5
> contour convert
> contour loadlevels ds9.lev
> contour savelevels ds9.lev
> contour copy
> contour paste wcs red 2 no
> contour color yellow
> contour width 2
> contour dash yes
> contour smooth 5
> contour method smooth
> contour nlevels 10
> contour scale sqrt
> contour log exp 1000
> contour mode zscale
> contour limits 1 100
> contour levels "{1 10 100 1000}"
> contour open
> contour close
> `

> crop

> Set current image display area.

> `Syntax:
> crop [<x> <y> <width> <height> [<coordsys>][<skyframe>][<skyformat>][degrees|arcmin|arcsec]
> ` `[match <coordsys>]
> [lock <coordsys>|none]``
> Example:
> string value = ds9.get(string cmd)
> ` `crop # get crop in physical coords
> ` `crop wcs galactic sexagesimal arcsec
> crop lock
> ` `ds9.set(string cmd)`
> `crop 40 30 10 20 # set crop in physical coords
> crop +104:51:06.915 +68:33:40.761 28.144405 22.000204 wcs galactic arcsec
> crop match wcs
> crop lock wcs`

> crosshair

> Controls the current position of the crosshair in the current frame. DS9 is placed in crosshair mode when the crosshair is set.

> `Syntax:
> crosshair [<x> <y> <coordsys> [<skyframe>][<skyformat>]]
> ` `[match <coordsys>]
> [lock <coordsys>|none]`
> `
> Example:
> string value = ds9.get(string cmd)
> crosshair # get crosshair in physical coords
> crosshair wcs fk4 sexagesimal # get crosshair in wcs coords
> crosshair lock
> ds9.set(string cmd)
> crosshair 100 100 physical # set crosshair in physical
> crosshair 345 58.8 wcs fk5 # set crosshair in wcs coords
> crosshair 23:01:00 +58:52:51 wcs fk5
> crosshair match wcs
> crosshair lock wcs
> `

> cube

> Controls FITS cube.

> `Syntax:
> cube [play|stop|next|prev|first|last]
> [<slice> [<coordsys>][<axis>]]
> [interval <numeric>]
> [axis <axis>]
> ` `[match <coordsys>]
> [lock <coordsys>|none]`
> `[open|close]
> Example:
> string value = ds9.get(string cmd)
> cube
> cube interval
> cube lock
> ds9.set(string cmd)
> cube play
> cube last
> cube 3
> cube 4.5 wcs 3
> cube interval 2
> cube axis 3
> cube match wcs
> cube lock wcs
> cube open
> cube close`

> cursor

> Move mouse pointer or crosshair in image pixels in the current frame. Note, this will move selected Regions also.

> `Syntax:
> cursor [<x> <y>]
> Example:
> ds9.set(string cmd)
> cursor 10 10
> `

> data

> Return an array of data values given a lower left corner and a width and height in specified coordinate system. The last argument of yes indicates to strip the coordinates from the output and just list the data values. The default is yes.

> `Syntax:
> data [<coordsys> [<skyframe>] <x> <y> <width> <height> [yes|no]]
> Example:
> string url = ds9.get(string cmd)
> data image 450 520 3 3 yes
> data physical 899 1039 6 6 no
> data fk5 202.47091 47.196811 0.00016516669 0.00016516669 no
> data wcs fk5 13:29:53.018 +47:11:48.52 0.00016516669 0.00016516669 no``
> `

> dsssao
> dss

> Support for Digital Sky Survey at SAO.

> `Syntax:
> dsssao []
> [<object>]
> [name <object>]
> [coord <ra> <dec> degrees|sexagesimal] # in wcs fk5
> [size <width> <height> degrees|arcmin|arcsec]
> [save yes|no]
> [frame new|current]
> [update frame|crosshair]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> dsssao name
> dsssao coord
> dsssao size
> dsssao save
> dsssao frame
> ds9.set(string cmd)
> dsssao
> dsssao m31
> dsssao name m31
> dsssao coord 00:42:44.404 +41:16:08.78 sexagesimal
> dsssao size 60 60 arcmin
> dsssao save yes
> dsssao frame current
> dsssao update frame
> dsssao open
> dsssao close
> `

> dsseso

> Support for Digital Sky Survey at ESO.

> `Syntax:
> dsseso []
> [<object>]
> [name <object>]
> [coord <ra> <dec> degrees|sexagesimal] # in wcs fk5
> [size <width> <height> degrees|arcmin|arcsec]
> [save yes|no]
> [frame new|current]
> [update frame|crosshair]
> [survey DSS1|DSS2-red|DSS2-blue|DSS2-infrared]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> dsseso name
> dsseso coord
> dsseso size
> dsseso save
> dsseso frame
> dsseso survey
> ds9.set(string cmd)
> dsseso
> dsseso m31
> dsseso name m31
> dsseso coord 00:42:44.404 +41:16:08.78 sexagesimal
> dsseso size 60 60 arcmin
> dsseso save yes
> dsseso frame current
> dsseso update frame
> dsseso survey DSS2-red
> dsseso open
> dsseso close
> `

> dssstsci

> Support for Digital Sky Survey at STSCI.

> `Syntax:
> dssstsci []
> [<object>]
> [name <object>]
> [coord <ra> <dec> degrees|sexagesimal] # in wcs fk5
> [size <width> <height> degrees|arcmin|arcsec]
> [save yes|no]
> [frame new|current]
> [update frame|crosshair]
> [survey poss2ukstu_red|poss2ukstu_ir|poss2ukstu_blue]
> [survey poss1_blue|poss1_red]
> [survey all|quickv|phase2_gsc2|phase2_gsc1]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> dssstsci name
> dssstsci coord
> dssstsci size
> dssstsci save
> dssstsci frame
> dssstsci survey
> ds9.set(string cmd)
> dssstsci
> dssstsci m31
> dssstsci name m31
> dssstsci coord 00:42:44.404 +41:16:08.78 sexagesimal
> dssstsci size 60 60 arcmin
> dssstsci save yes
> dssstsci frame current
> dssstsci update frame
> dssstsci survey all
> dssstsci open
> dssstsci close`

> envi

> Load an ENVI header and file. Optional parameter: array endian.

> `Syntax:
> envi <header> [<filename>]
> Example:
> ` ``envi foo.hdr``
> ``````envi foo.hdr foo.bsq``
> envi new foo.hdr foo.bsq``````````
> ``````

> exit
> quit

> Quits DS9.

> `Syntax:
> exit
> quit
> Example:
> ds9.set(string cmd)
> exit`

> export

> Export loaded image data of current frame in specified image format. Optional parameters: array endian, nrrd endian, jpeg quality (1-100) and tiff compression method.

> `Syntax:` `
> ` `export` `[array|nrrd|envi|gif|tiff|jpeg|png]` `<filename>``
> ` `export array <filename>``` `[big|little``|native]``
> ` `export nrrd <filename>` `[big|little``|native]`
> `export envi <header> [<filename>]` `[big|little``|native]``
> ` `` `export jpeg <filename>``[1-100]``
> ` `` `export tiff <filename``>``[none|jpeg|packbits|deflate]`
> `
> Example:
> ` ```ds9.set (string cmd)
> ` export array foo.arr little``
> ``export nrrd foo.nrrd little
> export envi foo.hdr little
> export envi foo.hdr foo.bsq little
> `` ````export tiff foo.tiff jpeg```
> export jpeg foo.jpeg 75
> export png foo.png`

> file

> Query currently loaded file information.

> `Syntax:
> file
> Example:
> string value = ds9.get(string cmd)
> file``
> `

> fits

> Load a FITS image into the current frame or query the currently loaded image.

> `Syntax:
> fits` ``[new|mask|slice] [<filename>]``
> ` [width|height|depth|bitpix|type]
> [size [wcs|wcsa...wcsz] [fk4|fk5|icrs|galactic|ecliptic] [degrees|arcmin|arcsecs]]
> [header [<ext>] [keyword <string>]]
> [image|table|slice]``
> Example:`
> ``string value = ds9.get(string cmd)`
> fits
> fits width
> fits height
> fits depth
> fits bitpix`
> `fits type`
> ``fits size
> ` fits size wcs fk5 arcmin
> fits header # primary
> fits header 2 # hdu 2
> fits header -2 # hdu 2 with inherit
> fits header keyword "'BITPIX'"
> fits header 1 keyword "'BITPIX'"`
> ``fits image
> fits table```
> fits slice
> ds9.set(string cmd, string url)```
> ` fits foo.fits
> fits new foo.fits
> fits bar.fits[bin=detx,dety]
> fits slice foo.fits
> fits mask foo.fits
> fits
> fits new
> fits -[bin=detx,dety]
> fits slice
> fits mask`

> Syntax:

> `fits [size|width|height|depth|bitpix]
> [size [wcs|wcsa...wcsz] [fk4|fk5|icrs|galactic|ecliptic] [degrees|arcmin|arcsecs]]
> [type]
> [header [<ext>] [keyword <string>]]
> [image|table|resample] [gz]
> [new|mask][<options>]
> [new][slice <options>]
> [new][mecube <options>]
> [new|mask][mosaicimage [iraf|wcs|wcsa...wcsz|wfpc2] <options>]
> [new|mask][mosaic [iraf|wcs|wcsa...wcsz] <options>]
> [new][rgbcube <options>]
> [new][rgbimage <options>]
> Example:
> string value = ds9.get(string cmd)
> fits size
> fits width
> fits height
> fits depth
> fits bitpix
> fits size wcs fk5 arcmin
> fits type
> fits header keyword "'BITPIX'"
> fits header 1 keyword "'BITPIX'"
> string url = ds9.get(string cmd)
> fits
> fits image
> fits image gz
> fits table
> fits table gz
> fits resample
> fits resample gz
> fits header # primary
> fits header 2 # hdu 2
> fits header -2 # hdu 2 with inherit
> ds9.set(string cmd, string url)
> fits
> fits [2]
> fits new [bin=detx,dety]
> fits slice
> fits mecube
> fits mosaicimage iraf
> fits mosaicimage wcs
> fits mosaicimage wcsa
> fits mosaicimage wfpc2
> fits mosaic iraf
> fits mosaic wcs
> fits rgbcube
> fits rgbimage`

> frame

> Controls frame functions. Frames may be created, deleted, reset, and centered. While return the current frame number. If you goto a frame that does not exists, it will be created. If the frame is hidden, it will be shown. The 'frameno' option is available for backward compatibility.

> `Syntax:
> frame [center [#|all]]
> [clear [#|all]]
> [new [rgb|3d]]
> [delete [#|all]]
> [reset [#|all]]
> [refresh [#|all]]
> [hide [#|all]]
> [show [#|all]]
> [move first]
> [move back]
> [move forward]
> [move last]
> [first]
> [prev]
> [next]
> [last]
> [frameno #]
> [#]
> [match <coordsys>]
> [lock <coordsys>|none]
> [has [amplifier|datamin|datasec|detector|grid|iis|irafmin|physical|smooth]]
> [has contour [aux]]]
> [has fits [ |bin|cube|mosaic]]
> [has marker [highlite|paste|select|undo]]
> [has system <coordsys>]
> [has wcs [<wcssys>|equatorial <wcssys>|linear <wcssys>]]
> Example:
> string value = ds9.get(string cmd)
> frame # returns the id of the current frame
> frame frameno # returns the id of the current frame
> frame all # returns the id of all frames
> frame active # returns the id of all active frames
> frame lock
> frame has amplifier
> frame has datamin
> frame has datasec
> frame has detector
> frame has grid
> frame has iis
> frame has irafmin
> frame has physical
> frame has smooth
> frame has contour
> frame has contour aux
> frame has fits
> frame has fits bin
> frame has fits cube
> frame has fits mosaic
> frame has marker highlite
> frame has marker paste
> frame has marker select
> frame has marker undo
> frame has system physical
> frame has wcs wcsa
> frame has wcs equatorial wcsa
> frame has wcs linear wcsa
> ds9.set(string cmd)
> frame center # center current frame
> frame center 1 # center 'Frame1'
> frame center all # center all frames
> frame clear # clear current frame
> frame new # create new frame
> frame new rgb # create new rgb frame
> frame delete # delete current frame
> frame reset # reset current frame
> frame refresh # refresh current frame
> frame hide # hide current frame
> frame show 1 # show frame 'Frame1'
> frame move first # move frame to first in order
> frame move back # move frame back in order
> frame move forward # move frame forward in order
> frame move last # move frame to last in order
> frame first # goto first frame
> frame prev # goto prev frame
> frame next # goto next frame
> frame last # goto last frame
> frame frameno 4 # goto frame 'Frame4', create if needed
> frame 3 # goto frame 'Frame3', create if needed
> frame match wcs
> frame lock wcs`

> gif

> Load GIF image into current frame.

> `Syntax:
> gif [new|slice] [<filename>]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` gif`
> ``ds9.set(string cmd)
> ` gif foo.gif`
> ``gif new foo.gif
> `` ```gif slice foo.gif
> `` gif`
> ``gif``new
> ` gif` `slice`

> grid

> Controls coordinate grid. For grid numeric format syntax, click here.

> `Syntax:
> grid []
> [yes|no]
> [type analysis|publication]
> [system <coordsys>]
> [sky <skyframe>]
> [skyformat <skyformat>]
> [grid yes|no]
> [grid color <color>]
> [grid width <value>]
> [grid style 0|1]
> [grid gap1 <value>]
> [grid gap2 <value>]
> [axes yes|no]
> [axes color <color>]
> [axes width <value>]
> [axes style 0|1]
> [axes type interior|exterior]
> ` `[axes origin lll|llu|lul|luu|ull|ulu|uul|uuu]`
> `[format1 <format>]
> [format2 <format>]
> [tickmarks yes|no]
> [tickmarks color <color>]
> [tickmarks width <value>]
> [tickmarks style 0|1]
> [border yes|no]
> [border color <color>]
> [border width <value>]
> [border style 0|1]
> [numerics yes|no]
> [numerics font times|helvetica|courier]
> [numerics fontsize <value>]
> [numerics fontweight normal|bold]
> [numerics fontslant roman|italic]
> [numerics color <color>]
> [numerics gap1 <value>]
> [numerics gap2 <value>]
> [numerics type interior|exterior]
> [numerics vertical yes|no]
> [title yes|no]
> [title text <text>]
> [title def yes|no]
> [title gap <value>]
> [title font times|helvetica|courier]
> [title fontsize <value>]
> [title fontweight normal|bold]
> [title fontslant roman|italic]
> [title color <color>]
> [labels yes|no]
> [labels text1 <text>]
> [labels def1 yes|no]
> [labels gap1 <value>]
> [labels text2 <text>]
> [labels def2 yes|no]
> [labels gap2 <value>]
> [labels font times|helvetica|courier]
> [labels fontsize <value>]
> [labels fontweight normal|bold]
> [labels fontslant roman|italic]
> [labels color <color>]
> [reset]
> [load <filename>]
> [save <filename>]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> grid
> grid type
> grid system
> grid sky
> grid skyformat
> grid grid
> grid grid color
> grid grid width
> grid grid style
> grid grid gap1
> grid grid gap2
> grid axes
> grid axes color
> grid axes width
> grid axes style
> grid axes type
> grid axes origin
> grid format1
> grid format2
> grid tickmarks
> grid tickmarks color
> grid tickmarks width
> grid tickmarks style
> grid border
> grid border color
> grid border width
> grid border style
> grid numerics
> grid numerics font
> grid numerics fontsize
> grid numerics fontweight
> grid numerics fontslant
> grid numerics color
> grid numerics gap1
> grid numerics gap2
> grid numerics type
> grid numerics vertical
> grid title
> grid title text
> grid title def
> grid title gap
> grid title font
> grid title fontsize
> grid title fontweight
> grid title fontslant
> grid title color
> grid labels
> grid labels text1
> grid labels def1
> grid labels gap1
> grid labels text2
> grid labels def2
> grid labels gap2
> grid labels font
> grid labels fontsize
> grid labels fontweight
> grid labels fontslant
> grid labels color
> ds9.set(string cmd)
> grid
> grid yes
> grid type analysis
> grid system wcs
> grid sky fk5
> grid skyformat degrees
> grid grid yes
> grid grid color red
> grid grid width 2
> grid grid style 1
> grid grid gap1 10
> grid grid gap2 10
> grid axes yes
> grid axes color red
> grid axes width 2
> grid axes style 1
> grid axes type exterior
> grid axes origin lll
> grid format1 d.2
> grid format2 d.2
> grid tickmarks yes
> grid tickmarks color red
> grid tickmarks width 2
> grid tickmarks style 1
> grid border yes
> grid border color red
> grid border width 2
> grid border style 1
> grid numerics yes
> grid numerics font courier
> grid numerics fontsize 12
> grid numerics fontweight bold
> grid numerics fontslant italic
> grid numerics color red
> grid numerics gap1 10
> grid numerics gap2 10
> grid numerics type exterior
> grid numerics vertical yes
> grid title yes
> grid title text {Hello World}
> grid title def yes
> grid title gap 10
> grid title fontsize 12
> grid title font courier
> grid title fontweight bold
> grid title fontslant italic
> grid title color red
> grid labels yes
> grid labels text1 {Hello World}
> grid labels def1 yes
> grid labels gap1 10
> grid labels text2 {Hello World}
> grid labels def2 yes
> grid labels gap2 10
> grid labels font courier
> grid labels fontsize 12
> grid labels fontweight bold
> grid labels fontslant italic
> grid labels color red
> grid reset
> grid load foo.grd
> grid save foo.grd
> grid open
> grid close
> `

> header

> Display current fits header dialog. Optional extension number maybe specified. Please note, this differs from samp fits header.

> `Syntax:
> header [<ext>]
> [close [<ext>]]
> [save [<ext>] <filename>]
> Example:
> string value = ds9.get(string cmd)
> header
> header 2
> header close
> `

> height

> Set the height of the image display window.

> `Syntax:
> height [<value>]
> Example:
> string value = ds9.get(string cmd)
> height
> ds9.set(string cmd)
> height 512
> `

> iconify

> Toggles iconification.

> `Syntax:
> iconify []
> [yes|no]
> Example:
> string value = ds9.get(string cmd)
> iconify
> ds9.set(string cmd)
> iconify
> iconify yes
> `

> iis

> Set/Get IIS Filename. Optional mosaic number maybe supplied.

> `Syntax:
> iis [filename <filename> [#]]
> Example:
> string value = ds9.get(string cmd)
> iis filename
> iis filename 4
> ds9.set(string cmd)
> iis filename foo.fits
> iis filename bar.fits 4`

> imexam

> Interactive examine function. A blinking cursor will indicate to the user to click on a point on an image. The specified information will be returned at that time.

> `Syntax:
> imexam [] [coordinate <coordsys> [<skyframe>] [<skyformat>]]
> [key] [coordinate <coordsys> [<skyframe>] [<skyformat>]]
> [any] [coordinate <coordsys> [<skyframe>] [<skyformat>]]
> [] [data [width][height]]
> [key] [data [width][height]]
> [any] [data [width][height]]
> Example:
> string value = ds9.get(string cmd)
> imexam coordinate image
> imexam key coordinate image # return coordinate and key event
> imexam any coordinate image # return coordinate and key/mouse event
> imexam coordinate wcs fk5 degrees
> imexam coordinate wcs galactic sexagesimal
> imexam coordinate fk5
> imexam data # return data value
> imexam key data # return data value and key event
> imexam any data # return data value and key/mouse event
> imexam data 3 3 # return all data in 3x3 box about selected point`

> jpeg

> Load JPEG image into current frame. Optional parameters: `jpeg` quality (1-100)

> `Syntax:
> jpeg [new|slice] [<filename>] [1-100]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` jpeg`
> ``jpeg 100`
> ` ``ds9.set(string cmd)
> ` jpeg foo.jpeg`
> ``jpeg new foo.jpeg
> `` ```jpeg slice foo.jpeg
> `` jpeg`
> ``jpeg``new
> ` jpeg` `slice`

> lock

> Lock all other frames to the current frame.

> `Syntax:
> ` `lock``` `[frame <coordsys>|none]
> ` `[crosshair <coordsys>|none]` `
> ` `[crop <coordsys>|none]`
> `[slice <coordsys>|none]`
> `[bin [yes|no]]
> [scale [yes|no]]
> [colorbar [yes|no]]
> [smooth [yes|no]]``
> ` `
> Example:
> ` `string value = ds9.get(string cmd)
> ` `lock frame
> lock crosshair
> ` `lock crop`
> `lock slice`
> `lock bin
> lock scale
> lock color` `bar
> lock smooth
> ` `ds9.set(string cmd)
> ` `lock frame wcs``
> ` `lock crosshair wcs
> ` `lock crop wcs`
> `lock slice wcs`
> `lock bin yes
> ` `lock scale yes
> ` `lock colorbar yes``
> lock smooth yes
> `

> lower

> Lower in the window stacking order.

> `Syntax:
> lower
> Example:
> ds9.set(string cmd)
> lower``
> `

> magnifier

> Controls the magnifier settings.

> `Syntax:
> magnifier [color <color>]
> [zoom <value>]
> [cursor yes|no]
> [region yes|no]
> Example:
> string value = ds9.get(string cmd)
> magnifier color
> magnifier zoom
> magnifier cursor
> magnifier region
> ds9.set(string cmd)
> magnifier color yellow
> magnifier zoom 2
> magnifier cursor no
> magnifier region no
> `

> mask

> Controls mask parameters.

> `Syntax:
> mask [color <color>]
> [mark 1|0]
> [transparency <value>]
> [clear]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> mask color
> mask mark
> mask transparency
> ds9.set(string cmd)
> mask color red
> mask mark 0
> mask transparency 50
> mask clear
> mask open
> mask close
> `

> match

> Match all other frames to the current frame.

> `Syntax:
> ` `match` `[frame <coordsys>]
> ` `[crosshair <coordsys>]` `
> ` `[crop <coordsys>]
> ` `[slice <coordsys>]
> [bin]
> [scale]
> [colorbar]
> [smooth]``
> ` `
> Example:
> ds9.set(string cmd)
> ` `match frame wcs
> ` `match crosshair wcs
> ` `match crop wcs`
> `match slice wcs
> match bin
> match scale
> match color` `bar
> match smooth`

> mecube

> Load FITS multiple extension file as data cube.

> `Syntax:
> mecube [new] [<filename>]
> Example:`
> `string value = ds9.get(string cmd)```
> ` mecube
> ` ```ds9.set(string cmd)
> `` mecube foo.fits`
> ``mecube new foo.fits
> ` mecube`
> `mecube` `new`

> minmax

> This is how DS9 determines the min and max data values from the data. `SCAN` will scan all data. `SAMPLE` will sample the data every n samples. `DATAMIN` and `IRAFMIN` will use the values of the keywords if present. In general, it is recommended to use `SCAN` unless your computer is slow or your data files are very large. Select the increment interval for determining the min and max data values during sampling. The larger the interval, the quicker the process.

> `Syntax:
> minmax [auto|scan|sample|datamin|irafmin]
> [mode auto|scan|sample|datamin|irafmin]
> [interval <value>]
> Example:
> string value = ds9.get(string cmd)
> minmax mode
> minmax interval
> ds9.set(string cmd)
> minmax scan
> minmax mode scan
> minmax interval 10`

> mode

> Controls the first mouse button mode.

> `Syntax:
> mode [none|region|crosshair|colorbar|pan|zoom|rotate|catalog|examine]
> Example:
> string value = ds9.get(string cmd)
> mode
> ds9.set(string cmd)
> mode crosshair`

> mosaic

> Load FITS mosaic segment into current frame.

> `Syntax:
> mosaic [wcs|wcsa...wcsz|iraf] [new|mask] [<filename>]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` mosaic``
> ` ``ds9.set(string cmd)
> ` mosaic foo.fits`
> ``mosaic wcs foo.fits``
> ``mosaic wcs new foo.fits``
> ``mosaic wcs mask foo.fits`````
> `` mosaic`
> ``mosaic wcs
> mosaic wcs``new
> ` mosaic wcs` `mask
> `

> mosaicimage

> Load FITS mosaic image into current frame.

> `Syntax:
> mosaicimage [wcs|wcsa...wcsz|iraf|wfpc2] [new|mask] [<filename>]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` mosaicimage``
> ` ``ds9.set(string cmd)
> ` mosaicimage foo.fits`
> ``mosaicimage wcs foo.fits``
> ``mosaicimage wcs new foo.fits``
> ``mosaicimage wcs mask foo.fits`````
> `` mosaicimage`
> ``mosaicimage wcs
> mosaicimage wcs new``
> ` mosaicimage wcs mask`

> movie

> Create mpeg1 movie from snap shots of the DS9 window. A `slice` movie cycles though all slices of a cube. A `frame` movie cycles through all active frames. A `3d` movie cycles through specified viewing angles. The default is `frame`. Optional parameters for `3d`: number of frames, azimuth from/to, elevation from/to, slice from/to, oscillate/repeat times.

> `Syntax:
> movie` `[slice|frame|3d]` `<filename>
> ` `movie 3d <filename> [number|azfrom|azto|elfrom|elto|slfrom|slto|oscillate|repeat <#>]`
> `
> Example:
> ds9.set(string cmd)
> movie slice ds9.mpg
> ` `movie 3d ds9.mpg number 10 azfrom -60 azto 60 oscillate 1`

> multiframe

> Load FITS multiple extension file as multiple images.

> `Syntax:
> multiframe [<filename>]
> Example:
> ` ``ds9.set(string cmd)
> ` multiframe foo.fits```
> ` multiframe`

> nameserver

> Support Name Server functions. Coordinates are in fk5.

> `Syntax:
> nameserver [<object>]
> [name <object>]
> [server ned-sao|ned-eso|simbad-sao|simbad-eso]
> [skyformat degrees|sexagesimal]
> [pan]
> [crosshair]
> [close]
> Example:
> string value = ds9.get(string cmd)
> nameserver
> nameserver server
> nameserver skyformat
> nameserver m31
> ds9.set(string cmd)
> nameserver m31
> nameserver name m31
> nameserver server ned-sao
> nameserver skyformat sexagesimal
> nameserver pan
> nameserver crosshair
> nameserver open
> nameserver close
> `

> nan

> Set image not-a-number color.

> `Syntax:
> nan <color>
> Example:
> ` `string value = ds9.get(string cmd)
> nan`
> `ds9.set(string cmd)
> nan red`

> nrrd

> Load an NRRD (Nearly Raw Raster Data) file. Optional parameter: array endian.

> `Syntax:
> nrrd [<filename>] [little|big]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` nrrd`
> ``nrrd big
> `` ```ds9.set(string cmd``, string url``)
> ` nrrd foo.nrrd``
> ````nrrd new foo.nrrd````
> ``````nrrd mask foo.nrrd
> ````` nrrd`
> `nrrd` `new
> nrrd mask`

> nvss

> Support for NRAO VLA Sky Survey.

> `Syntax:
> nvss []
> [<object>]
> [name <object>]
> [coord <ra> <dec> degrees|sexagesimal] # in wcs fk5
> [size <width> <height> degrees|arcmin|arcsec]
> [save yes|no]
> [frame new|current]
> [update frame|crosshair]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> nvss name
> nvss coord
> nvss size
> nvss save
> nvss frame
> ds9.set(string cmd)
> nvss
> nvss m31
> nvss name m31
> nvss coord 00:42:44.404 +41:16:08.78 sexagesimal
> nvss size 60 60 arcmin
> nvss save yes
> nvss frame current
> nvss update frame
> nvss open
> nvss close
> `

> orient

> Controls the orientation of the current frame.

> `Syntax:
> orient [none|x|y|xy]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> orient
> ds9.set(string cmd)
> orient xy
> orient open
> orient close
> `

> pagesetup

> Controls Page Setup options.

> `Syntax:
> pagesetup [orient portrait|landscape]`
> `[scale <numeric>]`
> `[size letter|legal|tabloid|poster|a4]`
> `
> Example:
> string value = ds9.get(string cmd)
> pagesetup orient
> pagesetup scale
> pagesetup size
> ds9.set(string cmd)
> pagesetup orient portrait
> pagesetup scale 50
> pagesetup size poster
> `

> pan

> Controls the current image cursor location for the current frame.

> `Syntax:
> pan [<x> <y> <coordsys> [<skyframe>][<skyformat>]]
> [to <x> <y> <coordsys> [<skyframe>][<skyformat>]
> [open|close]
> [close]
> Example:
> string value = ds9.get(string cmd)
> pan # get current image coords
> pan wcs fk4 sexagesimal # get current wcs coords
> ds9.set(string cmd)
> pan 200 200 image # pan relative
> pan to 400 400 physical # pan to physical coords
> pan to 13:29:55 47:11:50 wcs fk5 # pan to wcs coords
> pan open
> pan close
> `

> pixeltable

> Display/Hide the pixel table.

> `Syntax:
> pixeltable []
> [yes|open]
> [no|close]
> Example:
> string url = ds9.get(string cmd)
> pixeltable
> ds9.set(string cmd)
> pixeltable
> pixeltable yes
> pixeltable open
> pixeltable close
> `

> plot

> Display and configure data plots. All plot commands take an optional second command, the plot name. If no plot name is specified, the last plot created is assumed. Plot data is assumed to be a pair of coordinates, with optional error values. The follow are valid data descriptions:

> > xy x and y coordinates
> > xyex x,y coordinates with x errors
> > xyey x,y coordinates with y errors
> > xyexey x,y coordinates with x and y errors

> To create a new plot, use the plot new command.

> `Syntax:
> # create new empty plot window
> plot
> plot [bar|scatter]
> [new [name <plotname>] [line|bar|scatter]]
> [new [name <plotname>] [line|bar|scatter] <title> <xaxis label> <yaxis label>` `xy|xyex|xyey|xyexey``]
> # create new plot with data
> plot [new [name <plotname>]` `[line|bar|scatter]` `stdin] # title, title xaxis, title yaxis, dimension on line 1
> [new [name <plotname>] [line|bar|scatter] <title> <xaxis label> <yaxis label> xy|xyex|xyey|xyexey]
> # load dataset into an existing plot
> plot [<plotname>] [data xy|xyex|xyey|xyexey]
> ` ``
> plot [<plotname>] load <filename> [xy|xyex|xyey|xyexey]
> [<plotname>] save <filename>
> ` [<plotname>] clear
> ` ``````` [<plotname>] duplicate
> ````` ```````````` [<plotname>] stats
> ``` [<plotname>] list
> ``````` `````[<plotname>] loadconfig <filename>
> [<plotname>] saveconfig <filename>
> ````` `````[<plotname>] pagesetup orient [portrait|landscape]
> [<plotname>] pagesetup size [letter|legal|tabloid|poster|a4]`
> `````` `````[<plotname>] print
> [<plotname>] print destination [printer|file]
> [<plotname>] print command <command>
> [<plotname>] print filename <filename>
> [<plotname>] print color [rgb|gray]
> `` [<plotname>] close
> ``` ```````
> plot` [<plotname>] mode [pointer|zoom]
> `````` `
> # configure graph
> plot [<plotname>] axis [x|y] grid [yes|no]
> [<plotname>] axis [x|y] log [yes|no]
> ` `[<plotname>] axis [x|y] flip [yes|no]`
> ``[<plotname>] axis [x|y] auto [yes|no]
> [<plotname>] axis [x|y] min <value>
> [<plotname>] axis [x|y] max <value>``
> ` ``[<plotname>] axis [x|y] format <string>``
> ``` ``[<plotname>] legend [yes|no]
> [<plotname>] legend position [right|left|top|bottom]`
> ` ``[<plotname>] font [title|labels|numbers] font [times|helvetica|courier]
> [<plotname>] font`` ````[title|labels|numbers]`` size <value>
> [<plotname>] font`` ````[title|labels|numbers]`` weight [normal|bold]
> [<plotname>] font`` ````[title|labels|numbers]`` slant [roman|italic]
> `` `[<plotname>] title <string>`
> ``[<plotname>] title [x|y] <string>
> [<plotname>] barmode [normal|stacked|aligned|overlap]
> `` ```
> # configure current dataset
> ` plot [<plotname>] show [yes|no]
> `` ````[<plotname>] shape [circle|square|diamond|plus|splus|scross|triangle|arrow]````
> ```````` ````[<plotname>] shape fill [yes|no]````````
> ```````````` ````[<plotname>] shape color <value>````````````
> ```````````````````````` ````[<plotname>] smooth [step|linear|cubic|quadratic|catrom]````````````````````````
> ```````````````````````````````````` ````[<plotname>] color <value>````````````````````````````````````
> ```````````````````````````````````````````````````````````````````````` ````[<plotname>] width <value>
> ```````````````````````````````````````````````````````````````````````` ```````````````````````````````````````````````````````````````````````````````````````````````````````````` ````[<plotname>] dash [yes|no]````````````````````````````````````````````````````````````````````````````````````````````````````````````
> ```````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` ````[<plotname>] error [yes|no]````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````
> ```````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` ````[<plotname>] error color <value>````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````
> ``````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````[<plotname>] color <value>``````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````
> ```````````````````````````````````````````````````````````````````````` ````[<plotname>] error width <value>````````````````````````````````````````````````````````````````````````
> ```````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` ````[<plotname>] name <string>
> ```````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` ````
> # select current dataset
> ``` plot [<plotname>] select <value>
> ` `
> Example:
> # return all plotnames
> string value = ds9.get(string cmd)
> plot
> # create new empty plot window
> ds9.set(string cmd)
> plot
> plot scatter
> plot new
> plot new bar
> plot new name foo
> plot new name foo scatter
> # create new plot with data
> ds9.set(string cmd, string url)
> plot new stdin
> plot new name foo stdin
> plot new "{The Title}" "{X}" "{Y}" xy
> plot new name foo "{The Title}" "{X}" "{Y}" xy
> # load additional dataset into an existing plot
> ds9.set(string cmd, string url)
> plot data xy # plot additional data
> plot foo data xy # plot additional data
> ` ```````
> ``````` ````````````````string value = ds9.get(string cmd)
> `````` plot stats
> plot list
> ``` ds9.set(string cmd)
> ```` plot load foo.dat xy # load new dataset with dimension xy
> plot save bar.dat # save current dataset
> `` ``plot clear # clear all datasets
> plot duplicate # duplicate current dataset
> plot stats
> plot list
> `` ``plot loadconfig foo.plt # load plot configuration
> plot saveconfig bar.plt # save current plot configuration
> `` ``plot pagesetup orient portrait
> plot pagesetup size letter
> `` ``plot print
> plot print destination file
> plot print command "lp"
> plot print filename "foo.ps"
> plot print color rgb
> ` plot close # close current plot
> `` ````
> string value = ds9.get(string cmd)
> ` plot mode
> ``` ````ds9.set(string cmd)
> ` plot mode pointer`
> ` `
> # configure plot
> `` ``````string value = ds9.get(string cmd)
> ```` plot axis x grid
> ` ``plot axis x log
> `` ```plot axis x flip```
> ` ````````````````plot axis x auto
> `````````` ```````````plot axis x min
> ``````````` ````````````plot axis x max
> ````````````` ```````````````````````````plot axis x format
> ``````````````````````````` plot legend
> ```` `````plot legend position
> ````` ``````plot font numbers font
> `````` ```````plot font numbers size
> ``````` ````````plot font numbers weight
> ```````` `````````plot font numbers slant
> `````````` ``````````````plot title
> ````````````` ``````````````plot title x
> plot barmode
> `````````````` ``````````````````````````````` ```ds9.set(string cmd)
> ` plot axis x grid yes
> plot axis x log yes`
> `plot axis x flip yes``
> `` ````plot axis x auto no
> plot axis x min 0
> plot axis x max 100
> `` ````plot axis x format {%f}
> ```` plot legend yes # show legend
> ` `plot legend position left`````
> `` plot font numbers font times
> plot font numbers size 12
> plot font numbers weight bold
> plot font numbers slant italic
> ``` ``plot title {The Title}
> plot title x {X Axis}
> plot barmode aligned
> # configure current dataset
> `` ``````string value = ds9.get(string cmd)
> ```` plot show
> plot shape`
> ``plot shape fill
> `` ```plot shape color
> ``` ````plot smooth
> ```` `````plot color
> ````` ``````plot width
> `````` ```````plot dash
> ``````` ````````````````plot error
> ```````````````` ````````````````````````plot error color
> ```````````````````````` ````````````````````````````````plot error width
> ```````````````````````````````` ````````````````````````````````````````plot name
> ````````````````````````````````````````` ```ds9.set(string cmd)
> ` plot show yes
> plot shape circle
> ` ``plot shape fill no
> `` ```plot shape color cyan
> ``` ``plot smooth step
> ` plot color red
> plot width 2
> plot dash yes
> plot error yes
> plot error color red`
> `plot error width 2`
> `plot name {My Data}`
> `
> # select current dataset
> `` ``````string value = ds9.get(string cmd)
> ```` plot select
> `` ```ds9.set(string cmd)
> ` plot select 2`
> ` png

> Load PNG image into current frame.

> `Syntax:
> png [new|slice] [<filename>]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` png`
> ``ds9.set(string cmd)
> ` png foo.png`
> ``png new foo.png
> `` ```png slice foo.png
> `` png`
> ``png``new
> ` png` `slice`

> prefs

> Controls various preference settings.

> `Syntax:
> prefs clear
> Example:
> ds9.set(string cmd)
> prefs clear
> ` preserve

> Preserve the follow attributes while loading a new image.

> `Syntax:
> preserve [pan yes|no]
> [regions yes|no]
> Example:
> string value = ds9.get(string cmd)
> preserve pan
> preserve regions
> ds9.set(string cmd)
> preserve pan yes
> preserve regions yes
> `

> psprint

> For MacOSX and Windows, invokes postscript printing. For all others, same as print. Please see print for further details.

> print

> Controls printing. Use print option to set printing options. Use print to actually print.

> `Syntax:
> print [destination printer|file]
> [command <command>]
> [filename <filename>]
> [color rgb|cmyk|gray]
> [level 1|2]
> [resolution 53|72|75|150|300|600]
> Example:
> string value = ds9.get(string cmd)
> print destination
> print command
> print filename
> print color
> print level
> print resolution
> ds9.set(string cmd)
> print
> print destination file
> print command '{gv -}'
> print filename foo.ps
> print color cmyk
> print level 2
> print resolution 75`

> raise

> Raise in the window stacking order.

> `Syntax:
> raise
> Example:
> ds9.set(string cmd)
> raise`

> regions

> Controls regions in the current frame.

> `Syntax:
> regions [<filename>]
> [load [all] <filename>]
> [save <filename>]
> [list [close]]
> [epsilon <integer>]
> [show yes|no]
> [showtext yes|no]
> [centroid]
> [centroid auto yes|no]
> [centroid radius <value>|iteration <value>]
> [getinfo]
> [move front]
> [move back]
> [select all]
> [select none]
> [select invert]
> [delete all]
> [delete select]
> [format ds9|xml|ciao|saotng|saoimage|pros|xy]
> [system image|physical|wcs|wcsa...wcsz]
> [sky fk4|fk5|icrs|galactic|ecliptic]
> [skyformat degrees|sexagesimal]
> [strip yes|no]
> [shape <shape>]
> [color &ltcolor>]
> [width <width>]
> ` `[fixed|edit|rotate|delete yes|no]
> [include|exclude|source|background]`
> `` `[delim [nl|<char>]]
> [command <marker command>]
> [composite]
> [dissolve]
> [template <filename>]
> [template <filename> at <ra> <dec> <coordsys> <skyframe>]
> [savetemplate <filename>]
> [groups]
> [group new]
> [group <tag> new]
> [group <tag> update]
> [group <tag> select]
> [group <tag> color <color>]
> [group <tag> copy]
> [group <tag> delete]
> [group <tag> cut]
> [group <tag> font <font>]
> [group <tag> move <int> <int>]
> [group <tag> movefront]
> [group <tag> moveback]
> [group <tag> property <property> yes|no]
> [copy]
> [cut]
> [paste image|physical|wcs|wcsa...wcsz]
> [undo]
> [include|exclude|source|background|selected]
> [-format ds9|ciao|saotng|saoimage|pros|xy]
> [-system image|physical|wcs|wcsa...wcsz]
> [-sky fk4|fk5|icrs|galactic|ecliptic]
> [-skyformat degrees|sexagesimal]
> [-delim [nl|<char>]]
> [-prop select|edit|move|rotate|delete|fixed|include|source 1|0]
> [-group <tag>]
> [-strip yes|no]
> [-wcs yes|no]
> Example:
> string url = ds9.get(string cmd)
> regions
> regions -format ds9 -system wcs -sky fk5 -skyformat sexagesimal -prop edit 1 -group foo
> string value = ds9.get(string cmd)
> regions epsilon
> regions show
> regions showtext
> regions centroid
> regions centroid auto
> regions centroid radius
> regions centroid iteration
> regions selected
> regions format
> regions system
> regions sky
> regions skyformat
> regions strip
> regions shape
> regions color
> regions width
> regions delim
> regions source
> regions background
> regions include
> regions exclude
> regions selected
> regions groups
> ds9.set(string cmd, string url)
> regions -format xy -system wcs -sky fk5
> regions -format ds9
> ds9.set(string cmd)
> regions foo.reg
> regions -format ciao bar.reg # load as ciao format
> regions foo.fits # FITS regions files do not need a format specification
> regions load foo.reg # load foo.reg into current frame
> regions load all foo.reg # load foo.reg into all frames
> regions load *.reg# expand *.reg and load into current frame
> regions load all *.reg # expand *.reg and load into all frames
> regions save foo.reg
> regions list
> regions list close
> regions epsilon 5
> regions show yes
> regions showtext no
> regions centroid
> regions centroid auto yes
> regions centroid radius 10
> regions centroid iteration 20
> regions getinfo
> regions move back
> regions move front
> regions select all
> regions select none
> regions select invert
> regions delete all
> regions delete select
> regions format ds9
> regions system wcs
> regions sky fk5
> regions skyformat degrees
> regions delim nl
> regions strip yes
> regions shape ellipse
> regions color red
> regions width 3
> regions edit yes
> regions include
> regions command "circle 100 100 20 # color=red"
> regions composite
> regions dissolve
> regions template foo.tpl
> regions template foo.tpl at 13:29:55.92 +47:12:48.02 fk5
> regions savetemplate foo.tpl
> regions group new
> regions group foo new
> regions group foo update
> regions group foo select
> regions group foo color red
> regions group foo copy
> regions group foo delete
> regions group foo cut
> regions group foo font 'times 14 bold'
> regions group foo move 100 100
> regions group foo movefront
> regions group foo moveback
> regions group foo property delete no
> regions copy
> regions cut
> regions paste wcs
> regions undo
> `

> restore

> Restore DS9 to a previous state from a backup save set.

> `Syntax:
> restore <filename>
> Example:
> restore ds9.bck`

> rgb

> Create RGB frame and control RGB frame parameters.

> `Syntax:
> rgb []
> [red|green|blue]
> [channel [red|green|blue]]
> [view [red|green|blue] [yes|no]]
> [system <coordsys>]
> [lock wcs|crop|slice|bin|scale|colorbar|smooth [yes|no]]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> rgb channel
> ` `rgb lock wcs`
> `rgb lock crop`
> `rgb lock slice`
> `rgb lock bin
> rgb lock scale
> rgb lock colorbar
> rgb lock smooth
> rgb system
> rgb view red
> rgb view green
> rgb view blue
> ds9.set(string cmd)
> rgb # create new rgb frame
> rgb red # set current channel to red
> rgb channel red # set current channel to red
> rgb view blue no # turn off blue channel
> rgb system wcs # set rgb coordinate system
> ` `rgb lock wcs yes`
> `rgb lock crop yes`
> `rgb lock slice yes`
> `rgb lock bin yes`
> `rgb lock scale yes
> rgb lock colorbar yes
> rgb lock smooth yes
> rgb open
> rgb close`

> rgbarray

> Load raw data array cube into rgb frame.

> `Syntax:
> rgbarray [native|big|little]
> rgbarray [new|mask] [[xdim=<x>,ydim=<y>|dim=<dim>],[zdim=3],bitpix=<b>,skip=<s>,endian=[little|big]]
> Example:
> ` ```string value = ds9.get(string cmd)
> `` rgbarray
> rgbarray little
> ` ```ds9.set(string cmd)
> `` rgbarray foo.arr[dim=512,zdim=3,bitpix=-32,endian=little]
> rgbarray new foo.arr[dim=512,zdim=3,bitpix=``-32,endian=little]`

> rgbcube

> Load FITS rgbcube into rgb frame.

> `Syntax:
> rgbcube [new] [<filename>]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` rgbcube
> ` ``ds9.set(string cmd)
> ` rgbcube foo.fits`
> ``rgbcube new foo.fits
> ` rgbcube`
> `rgbcube` `new`

> rgbimage

> Load FITS rgbimage into rgb frame.

> `Syntax:
> rgbimage [new] [<filename>]
> Example:
> ` ```string value = ds9.get(string cmd)
> `` rgbimage
> ` ```ds9.set(string cmd)
> `` rgbimage foo.fits`
> ``rgbimage new foo.fits
> ` rgbimage`
> `rgbimage` `new`

> rotate

> Controls the rotation angle (in degrees) of the current frame.

> `Syntax:
> rotate [<value>]
> [to <value>]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> rotate
> ds9.set(string cmd)
> rotate 45
> rotate to 30
> rotate open
> rotate close`

> save

> Save loaded image data of current frame as FITS.

> `Syntax:
> save` `[fits|rgbimage|rgbcube|mecube|mosaic|mosaicimage] <filename> [image|table|slice]`
> `
> Example:
> ` ``ds9.set(string cmd)
> ` save foo.fits`
> `save fits foo.fits image`
> `save fits foo.fits table
> save fits foo.fits slice`
> `save rgbimage foo.fits
> ` `save rgbcube foo.fits`
> `save mecube foo.fits`
> `save mosaic foo.fits`
> `save mosaicimage foo.fits`

> saveimage

> Create a snap shot of the current DS9 window and save in specified image format. If no format specified, the file name extension is used to determine the output format. Optional parameters: `jpeg` quality (1-100) and `tiff` compression method.

> `Syntax:
> saveimage` `[fits|eps|gif|tiff|jpeg|png]` `<filename>
> saveimage <filename>.jpeg [1-100]
> saveimage <filename>.tiff [none|jpeg|packbits|deflate]
> Example:
> ds9.set(string cmd)
> saveimage ds9.tiff
> saveimage jpeg ds9.jpeg 75`

> scale

> Controls the limits and color scale distribution.

> `Syntax:
> scale [linear|log|pow|sqrt|squared|asinh|sinh|histequ]
> [log exp <value>]
> [datasec yes|no]
> [limits <minvalue> <maxvalue>]
> [mode minmax|<value>|zscale|zmax]
> [scope local|global]
> [match]
> [lock [yes|no]]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> scale
> scale log exp
> scale datasec
> scale limits
> scale mode
> scale scope
> scale lock
> ds9.set(string cmd)
> scale linear
> scale log exp 100
> scale datasec yes
> scale histequ
> scale limits 1 100
> scale mode zscale
> scale mode 99.5
> scale scope local
> scale match
> scale lock yes
> scale open
> scale close
> `

> shm

> Load a shared memory segment into the current frame.

> `Syntax:
> shm [<key> [<filename>]]
> [key <key> [<filename>]]
> [shmid <id> [<filename>]]
> [fits [key|shmid] <id> [<filename>]]
> [mosaicimage [iraf|wcs|wcsa...wcsz|wfpc2] [key|shmid] <id> [<filename>]]
> [mosaicimagenext [wcs|wcsa...wcsz] [key|shmid] <id> [<filename>]]
> [mosaic [iraf|wcs|wcsa...wcsz] [key|shmid] <id> [<filename>]]
> [rgbcube [key|shmid] <id> [<filename>]
> [rgbimage [key|shmid] <id> [<filename>]]
> [rgbarray [key|shmid] <id> [xdim=<x>,ydim=<y>|dim=<dim>,zdim=3],bitpix=<b>,[skip=<s>]]
> [array [key|shmid] <id> [xdim=<x>,ydim=<y>|dim=<dim>],bitpix=<b>,[skip=<s>]]
> [startload|finishload]
> Example:
> string value = ds9.get(string cmd)
> shm
> ds9.set(string cmd)
> shm 102
> shm key 102
> shm shmid 102 foo
> shm fits key 100 foo
> shm mosaicimage iraf key 100 foo
> shm mosaicimage wcs key 100 foo
> shm mosaicimage wcsa key 100 foo
> shm mosaicimage wfpc2 key 100 foo
> shm mosaicimagenext wcs key 100 foo
> shm mosaic iraf key 100 foo
> shm mosaic wcs key 100 foo
> shm rgbcube key 100 foo
> shm rgbimage key 100 foo
> shm rgbarray key 100 [dim=200,zdim=3,bitpix=-32]
> shm array shmid 102 [dim=32,bitpix=-32]
> shm startload # start a multiple load sequence without updating the display
> shm finishload # finish multiple load sequence
> `

> single

> Select Single Display mode

> `Syntax:
> single
> Example:
> string value = ds9.get(string cmd)
> single
> ds9.set(string cmd)
> single
> `

> skyview

> Support for SkyView image server at HEASARC.

> `Syntax:
> skyview []
> [<object>]
> [name <object>]
> [coord <ra> <dec> degrees|sexagesimal] # in wcs fk5
> [size <width> <height> degrees|arcmin|arcsec]
> [save yes|no]
> [frame new|current]
> [update frame|crosshair]
> [survey sdssi|sdssr|sdssg|sdssu|sdssg]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> skyview name
> skyview coord
> skyview size
> skyview save
> skyview frame
> skyview survey
> ds9.set(string cmd)
> skyview
> skyview m31
> skyview name m31
> skyview coord 00:42:44.404 +41:16:08.78 sexagesimal
> skyview size 60 60 arcmin
> skyview save yes
> skyview frame current
> skyview update frame
> skyview survey sdssi
> skyview open
> skyview close
> `

> sleep

> Delays execution for specified number of seconds. Default is 1 second.

> `Syntax:
> sleep [#]
> Example:
> ds9.set(string cmd)
> sleep
> sleep 2
> `

> smooth

> Smooth current image or set smooth parameters.

> `Syntax:
> smooth []
> [yes|no]
> [function boxcar|tophat|gaussian]
> [radius <int>]
> [open|close]
> [match]
> [lock [yes|no]]
> Example:
> string value = ds9.get(string cmd)
> smooth
> smooth function
> smooth radius
> smooth lock
> ds9.set(string cmd)
> smooth
> smooth yes
> smooth function tophat
> smooth radius 4
> smooth open
> smooth close
> smooth match
> smooth lock yes
> `

> source

> Source TCL code from a file.

> `Syntax:
> source [filename]
> Example:
> ds9.set(string cmd)
> source foo.tcl`

> tcl

> Execute one tcl command. Must be enabled via the -tcl command line option.

> `Syntax:
> tcl [<tcl command>]
> Example:
> ds9.set(string cmd)
> tcl puts "Hello, World"
> ds9.set(string cmd, string url)
> `

> theme

> Select GUI theme. Use `native` for the recommended theme for your platform. Note: not all themes are available on all platforms.

> `Syntax:
> theme [native|clam|alt|default|classic|aqua|vista|win|xp]
> Example:
> ` `string value = ds9.get(string cmd)
> ` `theme`
> `ds9.set(string cmd)
> ` `theme clam
> `

> threads

> Set number of process threads for functions which are multi-threaded.

> `Syntax:
> threads #
> Example:
> ` `string value = ds9.get(string cmd)
> ` `threads`
> `ds9.set(string cmd)
> ` `threads 8`

> tiff

> Load TIFF image into current frame. Optional parameters: `tiff` compression method.

> `Syntax:
> tiff [new|slice] [<filename>] [none|jpeg|packbits|deflate]
> Example:
> ` ``string value = ds9.get(string cmd)
> ` tiff`
> ``tiff jpeg`
> ` ``ds9.set(string cmd)
> ` tiff foo.tiff
> tiff new foo.tiff
> tiff slice foo.tiff```
> ` tiff
> tiff new
> tiff slice`

> tile

> Controls the tile display mode.

> `Syntax:
> tile []
> [yes|no]
> [mode grid|column|row]
> [grid]
> [grid mode [automatic|manual]]
> [grid layout <col> <row>]
> [grid gap <pixels>]
> [row]
> [column]
> Example:
> string value = ds9.get(string cmd)
> tile
> tile mode
> tile grid mode
> tile grid layout
> tile grid gap
> ds9.set(string cmd)
> tile
> tile yes
> tile mode row
> tile grid
> tile grid mode manual
> tile grid layout 5 5
> tile grid gap 10
> tile row
> tile column`

> update

> Updates the current frame or region of frame. In the second form, the first argument is the number of the fits HDU (starting with 1) and the remaining args are a bounding box in IMAGE coordinates. By default, the screen is updated the next available idle cycle. However, you may force an immediate update by specifying the NOW option.

> `Syntax:
> update []
> [# x1 y1 x2 y2]
> [now]
> [now # x1 y1 x2 y2]
> [on]
> [off]
> Example:
> ds9.set(string cmd)
> update
> update 1 100 100 300 400
> update now
> update now 1 100 100 300 400
> update off # delay refresh of the screen while loading files
> update on # be sure to turn it on when you are finished loading`

> url

> Load FITS from URL into the current frame

> `Syntax:
> url <url>
> Example:
> ` ``ds9.set(string cmd)
> ` url http://foo.bar.edu/foo.fits`

> version

> Returns the current version of DS9.

> `Syntax:
> version
> Example:
> string value = ds9.get(string cmd)
> version`

> view

> Controls the GUI.

> `Syntax:
> view [layout horizontal|vertical]
> [info yes|no]
> [panner yes|no]
> [magnifier yes|no]
> [buttons yes|no]
> [colorbar yes|no]
> [colorbar horizontal|vertical]
> [colorbar numerics yes|no]
> [graph horizontal|vertical yes|no]
> [filename yes|no[
> [object yes|no]
> [minmax yes|no]
> [lowhigh yes|no]
> [frame yes|no]
> [image|physical|wcs|wcsa...wcsz yes|no]
> [red yes|no]
> [green yes|no]
> [blue yes|no]
> Example:
> string value = ds9.get(string cmd)
> view layout
> view info
> view panner
> view magnifier
> view buttons
> view colorbar
> view graph horizontal
> view filename
> view object
> view minmax
> view lowhigh
> view frame
> view image
> view wcsa
> view red
> ds9.set(string cmd)
> view layout vertical
> view info yes
> view panner yes
> view magnifier yes
> view buttons yes
> view colorbar yes
> view graph horizontal yes
> view filename yes
> view object yes
> view minmax yes
> view lowhigh yes
> view frame yes
> view wcsa yes
> view red yes
> view green no
> view blue yes`

> vla

> Support for VLA Sky Survey.

> `Syntax:
> vla []
> [<object>]
> [name <object>]
> [coord <ra> <dec> degrees|sexagesimal] # in wcs fk5
> [size <width> <height> degrees|arcmin|arcsec]
> [save yes|no]
> [frame new|current]
> [update frame|crosshair]
> [survey first|stripe82]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> vla name
> vla coord
> vla size
> vla save
> vla frame
> vla survey
> ds9.set(string cmd)
> vla
> vla m31
> vla name m31
> vla coord 00:42:44.404 +41:16:08.78 sexagesimal
> vla size 60 60 arcmin
> vla save yes
> vla frame current
> vla update frame
> vla survey stripe82
> vla open
> vla close`

> vo

> Invoke an connection to a Virtual Observatory site.

> `Syntax:
> vo [method xpa|mime]
> [server <url>]
> [internal yes|no]
> [delay #]
> [<url>]
> [connect <url>]
> [disconnect <url>]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> vo
> vo method
> vo server
> vo internal
> vo delay
> vo connect
> ds9.set(string cmd)
> vo method xpa
> vo server "http://foo.bar.edu/list.txt"
> vo internal yes
> vo delay 15
> vo chandra-ed
> vo connect chandra-ed
> vo disconnect chandra-ed
> vo open
> vo close
> `

> wcs

> Controls the World Coordinate System for the current frame. If the wcs system, skyframe, or skyformat is modified, the info panel, compass, grid, and alignment will be modified accordingly. Also, using this access point, a new WCS specification can be loaded and used by the current image regardless of the WCS that was contained in the image file. WCS specification can be sent to DS9 as an ASCII file . Please see WCS for more information.

> `Syntax:
> wcs [[system] wcs|wcsa...wcsz]
> [[sky] fk4|fk5|icrs|galactic|ecliptic]
> [[skyformat] degrees|sexagesimal]
> [align yes|no]
> [reset [#]]
> [replace [#] <filename>]
> [append [#] <filename>]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> wcs
> wcs system
> wcs sky
> wcs skyformat
> wcs align
> ds9.set(string cmd)
> wcs wcs
> wcs system wcs
> ` `wcs fk5
> ` `wcs sky fk5
> ` `wcs sexagesimal
> ` `wcs skyformat sexagesimal
> wcs align yes
> wcs reset
> wcs reset 3
> wcs replace foo.wcs
> wcs replace 3 foo.wcs
> wcs append foo.wcs
> wcs append 3 foo.wcs
> ds9.set(string cmd, string url)
> wcs replace
> wcs append
> wcs open
> wcs close
> `

> web

> Display specified URL in the web display.

> `Syntax:
> web [new|<webname>] [<url>]
> [<webname>] [click back|forward|stop|reload|#]
> [<webname>] [clear]
> [<webname>] [close]
> Example:
> string value = ds9.get(string cmd)
> web
> ds9.set(string cmd)
> web www.cnn.com
> web new www.cnn.com
> web hvweb www.apple.com
> web click back
> web click 2
> web clear
> web close
> `

> width

> Set the width of the image display window.

> `Syntax:
> width [<value>]
> Example:
> string value = ds9.get(string cmd)
> width
> ds9.set(string cmd)
> width 512
> `

> zscale

> Set Scale Limits based on the IRAF algorithm.

> `Syntax:
> zscale []
> [contrast]
> [sample]
> [line]
> Example:
> string value = ds9.get(string cmd)
> zscale contrast
> zscale sample
> zscale line
> ds9.set(string cmd)
> zscale
> zscale contrast .25
> zscale sample 600
> zscale line 120
> `

> zoom

> Controls the current zoom value for the current frame.

> `Syntax:
> zoom [<value>]
> [<value> <value>]
> [to <value>]
> [to <value> <value>]
> [to fit]
> [open|close]
> Example:
> string value = ds9.get(string cmd)
> zoom
> ds9.set(string cmd)
> zoom 2
> zoom 2 4
> zoom to 4
> zoom to 2 4
> zoom to fit
> zoom open
> zoom close
> `