ALT-Z functionality
 

The ALT-Z shortcut is supposed to insert the data/time, which it does, most of the time. However, when renaming an item, ALT-Z just aborts and leaves the name unchanged. For consistency, shouldn't ALT-Z also insert the date/time when renaming an item?

For technical reasons, that is not supported. Instead of F2, Alt+Z, use Item | Rename to | Date+Time on the menu (you can also connect a keyboard shortcut to this command via Tools | Customize | Keyboard).