Ability to Scale Drawings

Having the ability to set a scale - either as a temporary scale that can be changed as you move across the board, or a scale for each frame or something. So that you can correlate a box of X pixels (inches would be better) to a real life scale of X feet. This is related to the release of object dimensions. This would be so helpful for architecture firms using this as a collaborative drawing tool since apps like Morpholio Trace do not have great collaboration features.