Thank you for feedback!
Yes Zingo you're right, the ring is gps. (I think).
I first made this sketches a while ago looking at my 615. After having seen 625 and 625XT I realize this might not be needed.
The S is for Start/stop/lap. Better symbol could probably be invented.Shortcuts
Middle button to the left could be power or shortcuts depending on how shortcuts will be used.
Either shortcuts is made by pressing two buttons at the same time (like shortcutbutton and arrow up for gps off...etc) or shortcutbutton opens a window looking like the one below. Shortcuts are then confirmed by ok-button. If power off is chosen ok-button should be hold 3 seconds to power off to prevent switching off by accident. Tried to make a few pictures below. As you can see I can not really use these photoprograms.
Thank you Zingo for embedding my picture above. Tried to resize it and put it back but it didn't work out. Therefore your black rectangle.