Undo and redo history

The undo/redo history is held on a per-form-window basis, up to a user-definable maximum number of actions.

The default is 20.

These actions are supported by the Undo/Redo History feature:

Control creation
Control deletion
Form window property modification (via the property browser or via resize)
Change control type
Control reparenting
Tab page/grid column reordering
Tab order changes
Form permission changes
Form help changes