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## Files and Directories

XTrkCad uses two directories on your system:

- /usr/local/lib/xtrkcad/ - XTrkCad Library directory, contains the data files used by XTrkCad. You can change this by defining the XTRKCADLIB environment variable before starting XTrkCad.
- ${HOME}/.xtrkcad/ - XTrkCad Working directory, which contains the pre-user configuration files.

Layout files (*.xtc) and export files (*.xti) can be saved anywhere you wish, as specified in the Save File and Open File dialogs.

Example layouts can be found in /usr/local/lib/xtrkcad/examples/.

- xtrkcad.xtq is the main parameter file which contains definitions for each scale. It also includes turnout definitions for the demos and lists the playback (.xtr) files for the demos.
- params\*.xtp files are the XTrkCad Library parameter files. These files (atlasn.xtp, pecon55.xtp, ...) contain definitions for turnouts and sectional track pieces. These files are loaded by the Parameter Files dialog.
- xtrkcad.info is the XTrkCad help file for Linux.
- xtrkcad.bug is a list of current bugs.
- xtrkcad.enh and xtrkcad.fix are the list of enhancement requests and the XTrkCad change history.
- xtrkcad.tip contains the Tip of the Day information accessible from the Help menu.
- xtrkcad.upd contains the list of parameter files supplied with XTrkCad
- demos\*.xtr are the XTrkCad demonstration files which can be run via the Help|Demos menu item.
- examples\*.xtc contain some example files

XTrkCad Working directory

- xtrkcad.ckp and xtrkcad.ck1 are the check-point files created periodically while running XTrkCad. If your system (or XTrkCad) hangs or crashes you can recover (most of) your work by copying xtrkcad.ckp to your current layout file.

  xtrkcad.ck1 is the previous check-point file (in case Check Pointing fails).

  The check-point frequency is set by the Options|Preference|Check Pointing field.

- The xtrkcad.cus file contains parameter information. This is mostly information created by the Turnout Designer dialogs and Group command. You can use the Edit|Custom Management dialog to manipulate these parameters.
- The xtrkcad.key file contains your XTrkCad registration information.

  This file is for your personal use only and may not be used by anyone else.

- The xtrkcad.rc file contains various parameter settings from each use of XTrkCad. Most changes you make (such as Scale, Room Size, Window Position) are saved in this file for the next time you use XTrkCad.

### Removing XTrkCad

Remove XTrkCad by deleting the XTrkCad Install directory, deleting the ${HOME}/.xtrkcad directory, and deleting any *.xtc and *.xti files.

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