The Undo & Redo commands are only available when the project is locked, and they can be used as follows:
 | Undo | Erases the last change done, reverting the project to a previous state. |
 | Redo | Reverses the Undo command. |
Note
The extended lock is maintained across multiple browsers and devices. For example, if a project manager locks projects or work packages on a desktop and then wants to continue editing on a tablet, the lock is still in place when he starts the tablet session.