I am working on a part for an RC airplane - the canopy for the plane. I have imported an STL file for the canopy into Sketchup; it’s a reasonably complex shape (different curves), but there is a small modification I would like to make for it. Essentially, there is a place in the shape where I would like to make a rectangular “compartment” about half its current height (making it more shallow – imagine a shoebox that you want to squish down to make it a flatter/shorter box).
The problem is, I can’t simply pull/push the surface I would like to move to “squish” the rectangular compartment. I can select the entire shape, and with some effort I can select the components of the particular face with the push/pull tool, but I am not able to move the surface to achieve the desired effect. Any guidance would be much appreciated.