hi, thanks for your help! Yes, i'm drawing the rectangle (as example, i have the same issue with all 2D items), then i'm moving to the box, edit the size (without removing the semicolon or the unit) then pressing enter, but nothing happens. it's the same way i did on the previous version of sketchup, and it always worked. The issue is only on the new 2013 version, i still have v8 on the same machine but it's working fine. I'm using the english version for both, i'm not native english but it's easy for me using the same language of the tutorials.