fuli, how's it going?

Not everything's on the cards or in the manual... but you can create an action for rotating the canvas and assign it whatever keystroke combo you want (within reason ;)). I've made some for my self because i find it necessary often in the work i do.

as for restarting an Action, it's best to just use the ICON (the little triangle) when the Action stops. You would have to do some scripting/programing to restart a "specific" action again...

I'm compiling a "ShortCut" list for diff vers of PS to add to the Resource Center.
til then, let me know if you need to find one,
see ya around,
:)
retrocity