Undo and Redo

The undo function restores back the state before the previous editing operation. Depending on the case, undo operation may store just the edited object (point, line, sounding, triangle, etc.) or with bigger operations, whole active file. When storing the whole file, point limit in the file settings is checked. If the file has more points, user is informed that the operation cannot be restored and permission to continue is asked. This point limit is also maximum amount of points store by the undo feature. When the total amount of points stored exceeds it, the oldest undo operations are removed.

The redo function restores back the state before the previous undo operation. Removing any file from the element list clears the undo store. Also, if user chooses to continue after being warned that the operation cannot be restored, the undo store is cleared.

Undo does not work with file element adding or point group point adding or removing.

If Undo- and Redo-buttons are added to the toolbar, their tooltips display five latest operations in general level (e.g. Edit line, Add point, etc.). Normal shortcut keys Ctrl-Z (undo) and Ctrl-Y (redo) work also. Additionally, redo works also with the key combination Shift-Ctrl-Z.