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## General Operation

### Mouse Buttons

XTrkCad uses the left and right mouse buttons when manipulating tracks and other objects on the layout. Their meaning depends on the particular command but in general:

- Left-Click - selects an object or an End-Point.
- Left-Drag - modifies an object, such as extending it.
- Right-Click - displays a popup-menu of commands.
- Shift-Right-Click - displays a popup-menu of command options (for some commands).

When Moving and Rotating ( Placing Turnouts and Structures, Moving the Print and Snap Grids, ... ):

- Left-Drag - moves the objects or grid.
- Right-Drag - rotates the objects or grid about the pivot point, which is the point you started the drag operation.

Some commands use the Shift or Control key to modify the meaning of button presses.

### Dialogs

Most dialogs have three standard buttons:

- Ok - Completes the dialog, and the layout is updated with the current changes.
- Cancel - Cancels the dialog, and the layout is reverted to its previous state.
- Help - Invokes the on-line help for the current command or dialog.

### Accelerator Keys

Most commands have accelerator keys defined which allow you to invoke the command directly (instead of using the menus or the buttons on the Tool Bar).

The Return key has the same effect as pressing the Ok button on the current dialog.

The Escape key cancels the current command. All selected tracks are unselected. The Describe or Select command becomes the current command.

The Page Up and Page Down keys will zoom out or zoom in.

The arrows key will pan the canvas right, left, up and down.

The Delete key invokes the Delete command.

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