Hello. It appears in the most recent update (the 26th of May?), the UNDO button at the top of the WRITER interface has disappeared.
The UNDO/REDO option exists in the "three-dot" menu, but it is very inconvenient to access every time. Also, using a bluetooth keyboard (Microsoft), the Ctrl-Z key command causes a crash (this crshing was a bug before the update, but using the UNDO button at the top was acceptable --BTW all other key commands work, except for Ctrl-Z).
I am using Android 4.4.2 on a Samsung Galaxy tab.
Can you please advise? THank you.