In the Edit
menu, select Undo.
or
On the Edit
toolbar, click on the Undo 
icon.
This command allows you to reverse the last actions made. The first time you select this option, CuteHTML Pro will reverse the last action you performed. If you select this option again, CuteHTML Pro will reverse the action before that, and so forth.
In the Edit
menu, select Undo.
or
On the Edit
toolbar, click on the Undo
icon.
You can also use a shortcut by simultaneously pressing on the keys CTRL+Z (Refer to list of shortcuts).