Dormer Walls extending into room

[Designer100]

Can someone assist in telling me how to remove walls that project into the room with domer that are slope up to room ht.  I used automatic dormer to create.. I need to hid the part that does that. Make invisible or something. any help appreciated. 

 

Thanks

Suttles.James Remodeling 04.2016.plan

[dshall]

Can someone assist in telling me how to remove walls that project into the room with domer that are slope up to room ht.  I used automatic dormer to create.. I need to hid the part that does that. Make invisible or something. any help appreciated. 

 

Thanks

 

 

Select dormer,  explode dormer,  take the portion of wall you do not want to seem,  put them on their own layer,  turn layer off in plan view.