If you call up the Plates, and, in particular, call up a SID or STAR, the button to return to the moving map mode is on the left.
But if you call up "Instruments" in Map Mode, the button to return to the moving map is on the right.
For consistency, I suggest the button on the Plates page should be on the right. ("North up" on a SID or STAR is greyed out anyway.)
Update: But then I noticed that the Return to Map button is on the left when you're in a Airport View mode, and North Up is still active. Rats. So perhaps the solution is to always put the "Return to Map" button on the left, even if it means shifting the mail menu buttons over to the right one? OR, Return to Map could go up above the "Own Ship" button in the left?