The Undo command provides a high level of freedom when making database edits. When Undo is enabled, you may experiment with edits without fear of data loss. Since undo is available as the U hotkey you may undo edits immediately without even having to exit the current command. Undo works for all edits regardless of size, and there is no limit to the number of edits you can undo. Just remember to enable Undo with the Options|Configure/General command before making your edits. Then use the Edit|Undo command, the toolbar button, or the U hotkey to undo changes as desired.