Undo (action)

Negates the last drawing operation. The tool used to perform the operation is shown (for example, Undo place line).

You cannot undo settings changes.

After you undo a drawing operation, the operation previous to the negated operation can be undone. You can, therefore, undo a series of previous operations by repeatedly choosing Undo.

There is no limit to the number of undos that can be performed.

Key-in: UNDO

If you know how many drawing operations you want to undo, key in UNDO n, where n is the number of operations.

To negate the last undo operation, choose Redo (action) from the Edit menu.

To undo a text editing action in a single line field of a settings box or dialog box, press <CTRL-Z>.