I wanted to check scale against existing. The plan I imported for example has a 15' dimension spelled out from septic tank to back of house foundation. Using my point to point I draw the line and it does not snap a measurement just a "1" where I start to drag and a "2" until I release my left mouse button where I end it. Point one and point 2. The dimension if really zoom in says 560' I need it to be 15'. My line is above the existing 15' in the picture.