One of the problems with doing CAD drawings is that you cannot always think like a carpenter in assembling the pieces. In HD Pro, you cannot miter the ends of a roof beam to fit under a gable without the corners sticking through the roof. I tried using slab and countertop shapes. These shapes couldn't be shaped or rotated into position under the gable. The simple solution to this is to stack 2 or more rectangular objects on top of each other, pyramid style. (This is not a problem in Chief Architect, as you can create any kind of shaped polygon in space and place it anywhere). In the following pictures, gable1 and gable2 represent a single decorating beam sticking through the roof. Gable3,4,5 demonstrate the results of stacking 2 beams pyramid style with the result of no roof penetration. Although this is a simple tip, it probably has many applications in HD Pro due to the lack of extensive polygon editing. Sometimes you have to think like a kid stacking blocks....