It seems I can change the spacing and size of roof framing members but not the type.
For example if I want to frame one plane with 8" x 18" Glu-Lams @ 48" O.C. and another with I-Joists @ 16" O.C. it seems like I have to choose one or the other. Is there a way to use 2 different types of roof framing members? Using auto roof framing.