You can undo or redo actions in TiCon. This functionality is also referred to as "undo" and "redo". In each case, the last action performed can be undone or redone.
How do I undo an action?
If you have performed one or more actions, you can undo the most recent action.
To do this, click Undo 
on the Quick Access Toolbar, or press the keyboard shortcut Ctrl + Z.
How to redo an action?
To redo something you've undone, click Redo 
in the Quick Access Toolbar or press the shortcut Ctrl + Y.