The Undo and Redo facilities

The Undo command can apply to the following actions:
  • In Style Editing mode:
    • Property settings
    • Rule changes (creation or modification using a wizard, enable/disable)
    • Cut or Delete operations done using the Rule Menu
    • Selecting/clearing an option in the Options dialog box displayed when you choose Edit>Options
  • In Diagram Editing mode:
    • Object moves
    • Object creation
    • Object deletion
    • Property changes in the Data Properties view
To undo one of these actions, choose Edit>Undo.
There are unlimited levels of Undo.
When you have undone an operation, you can redo it by choosing Edit>Redo .