Addition to existing home. Addition to have a shed roof.

[Jesse O'Roscoee]

That is exactly what I am attempting. When both rooms are on the 1st floor, I can not generate your picture. When I designate the two new perpendicular walls as gables, the slope of the new roof starts at the new exterior wall and extends past the existing gable wall and then forms a small hip at the top. I will try to send a picture. Just started with the Hometalk. Thank you for your help so far.