To restore the last revoked operation, please use one of the following methods:

1. Click the 'Redo' button in the 'clipboard' area of the 'Edit' menu.

2. Press the Ctrl+R shortcut key combination.

3. Right click on the program editor (ladder diagram/instruction list/function block diagram/function block), and then select the "Redo" command from the context menu.

Multiple 'restore' commands can be issued to restore the modified state before revocation. If commands such as "open", "close", "compile" are issued or some conversion processing is performed on the entire ladder diagram, the "restore" buffer will be erased. The next revocation record is the beginning of a new 'restore' sequence.