Ruler & shape tool reset & snap
I think a great idea would be a reset function for the circle and square tool. Maybe a double tap in the middle button would reset the circle shape to a perfect circle and reset the square to a perfect square. So often I’m trying to make exact shapes and I’m always off by a few pixels. Also with the ruler tool it would be great to turn the ruler with 3 fingers and have it snap to 90 degrees, 180 degrees etc.