I am using sketchup to measure areas within an existing flat plan for a hotel. I have imported CAD information, with many layers, and moved them into a single SU layer.
When I try to outline a single room using the line tool I find that points are inferred or picked up from the imported CAD layer, making closure of the edges impossible. So I can not measure area.
Why are the pints from the imported layer “coming through” onto layer 0 where I’m working?