I used SU 2016 for the 30 day trial. Today I purchased and downloaded SU 2017. When I opened a new file and imported a floor plan .jpeg I attempted to scale the plan for the model as I had in SU 2016. I used the Tape Measure Tool to measure a known distance in the plan (the length of the ramp - 12’0"). When the measurement was revealed in the lower right hand box, I changed it to the correct dimension and hit return. In SU 2016 I got a dialogue box that asked if I wanted to size the model using this dimension. In SU 2017 absolutely nothing happened. No dialogue box. Nothing. I’m absolutely stymied and hamstrung. Did I do something incorrectly? I thought I had the answer when I saw your solution. Perhaps it’s because I’m working on an iMac. However, I tried with control and command (which sometimes is used for PC “control”. Still - nothing is working! HELP