Shed dormer

[Allen42ACJ]

See if this helps..
I like to add a center line to get the ridge point.Adjust the back pitch to move what you get..

[RootFarm]

Allen, I got the impression she was looking for something like this:

[annp]

Root - that is exactly what I'm looking to do. I tried using "auto-dormer", changing the roof type to "shed," but it's not attaching to the existing roof (see pic)...