Undo

The given mode allows  to restore a raster into a state, in which it was before execution of the last image editing operation.

Through the mode Undo it is possible to restore the raster image edited in the previous session of  Panorama program. The copy an edited part of the raster image is stored in the file with a raster name and extension ~~ w (*. ~~ w).

During a map editing process it is fulfilled the control of a free disk space for saving a copy of an edited part of the raster image. If there is not enough free space on the disk program sets a question:

There is no space for backup raster copy. To continue construction?.

It is possible to refuse editing or to prolong editing without further possibility of restoring  an edited raster image part.

Restriction: The mode does not work with a DOS-rasters RST (*.rst) structure.