gable roof over alcove

[50cal]

Hi all,

I just started using Home Designer Architectural 2014 and I'm trying to model a gable roof over an alcove. I'm modeling a building which has an exterior door inset a few feet from the wall. The ceiling over the alcove is right above the door frame. So after I use the Gable/Roof Line to extend the roof over the alcove, I view it in 3D and see that the alcove extends all the way up to the peak of the roof.

How do I "fill in" the alcove?

(I tried to insert an image of what I'm talking about but the "Insert Image From Computer" is not working properly)

Thanks...