Thanks for your answer...the problem is that I need to draw a lot of those circles in my "closet" drawing. The closet shelves are connected with dowels, so I need to know for each shelf where the connections (dowels) are.

Hi,
I'm very new to Sketchup and have a small question. I have drawn 2 boxes and on one of them I have a circle. After putting the boxes upon each other, I have done "Intersect Faces > with model".
The resulting circle on the upper box is not really a circle and thus useluss for me . Is there a way to convert it in a real circle?

Thanks in advance,
Herman