You can undo changes that you make to objects in modules.
About this task
To discard changes when you are editing in the module window,
click on the Commit toolbar.
To undo your last change, select Edit > Undo. To undo any changes that are recorded in the object
history, use the Object Properties window.
Procedure
Click Edit > Object > Properties, and then select the History tab. All the changes that have been made to the object since the
last baseline are displayed. You can display changes that were made
to baselined objects using the buttons in Baseline History.
Select the history record that contains the change that
you want to undo, and click Restore. All changes that were made after the restored history
record are undone.