Repair
Re-builds and remaps the screen display for the image in case it is incorrect. (Alt-R has the same effect).
Reinitialize / Reset program
Resets all program data to initial values. This can sometimes restore functionality in case user closed a dialog window using the Window Manager instead of in imal, or if the program gets screwed up for some reason.
Show Alpha Channel
Temporarily displays contents of the alpha channel. Pressing Alt-1 has the same effect. Pressing Alt-R or selecting ``Repair'' restores the display.
Backup
Creates a backup copy of the current image in memory. This is recommended before manipulating the image or adding text, in case you don't like the results. Selecting ``Restore'' will retrieve the screen back onto the screen. See also sec. 12.4.
Restore Replaces the current image with the backed-up copy if one exists.
Note: The FFT is not backed up. If the image has been Fourier-transformed, only the original image is restored. If the display is set to show the real, imaginary or power spectrum components, restoring the image will not affect the display. However, the next time the image is transformed, the restored data will be used.
Note: if the depth of an image is changed, the original backup is no longer valid and is automatically discarded.
Clear alpha channel
Removes all labels in current image. Image backups must be turned on for this to work.
Manually select area (F3)
Starts non-rectangular area selection mode. Click the 1st mouse button and drag to outline the desired area(s). Then click the main Cancel button when finished. The areas need not be contiguous. Function key F3 has the same effect.
Switch selected/unselected
Changes a non-rectangular selected region so that the complement of what was selected is now selected. For example, if you double-clicked on an object, the selection now becomes a stencil. If the selected region extends over 2 or more images, only the part in the currently-selected region is inverted.