It would be great if there were a quicker way to access the “Show hidden edges” toggle.
Currently, it is a three step process with a pen move between each step — one of the most difficult to access features, yet one of the most useful IMHO.
The orientation icon, very conveniently already does double duty, with a double tap performing a “reset view”.
How about using a double tap on the “View/Appearance” icon to toggle the hidden edges setting?