I have imported a photo of an object and I've adjusted the perspective grids. I have moved the red and green dimension lines into position, but I am unable to stretch/adjust the ends on the dimension lines. When I move my cursor over the end point it turns from a move (4-point arrows) to a stretch (2-point arrows) cursor, but I cannot drag the end of the dimension line to where it needs to be on my photo.
I just be doing something wrong and I'd welcome any guidance.