Roof plane will not go to stud. will only stop at exterior cladding

[SHCanada2]

The roof plane edge will not follow the dimension I give it, it goes back to either what looks like the exterior of the cladding (the walls have 1" exterior foam) or it allow me to move the roof plane into the attcic.

 

The problem is I have to specify to the stud for the truss guys. So I created a little jog on the eave. 

 

IS there a trick here? Even if I could move the roof plane to the stud, then the exterior render shows the framing as the roof then cuts the siding and 1" insulation off the elevation view.

 

Even if I use the cntrl key it will not place the edge at 18".

 

maybe because there is an attic wall there?

 

 

 

 

 

Edited October 23 by SHCanada2

[robdyck]

[PitMan71]

What Robert said. Gotta uncheck that box.

[SHCanada2]

yes that worked, thanks Robert