Thanks for the response!
Dragging the dimension would work, but it requires turning off auto-dimensions. When I drag I see the following pop-up:
Again, I guess I could (and probably should) give up and just do it with Manual dimensions, send it to my layout and call it a day, but I kind of want to learn how to fix this problem "correctly" so I'm not re-doing the workaround if I need to change the dimensions. Auto dims worked perfectly with my other view and it was really nice to tweak everything and then have it update correctly.
It's E9 (marked with "Elevation 1"). I added a new one just to see if something was weird with E7, but I have the problem with both.
I have used both clip to sides and clip to room. It _definitely_ clips what is "visible" in the elevation, but still includes the wall (again, I think! this is my theory! ):
I would just redraw the wall to see if that is the problem somehow but it's part of 2 floors where one is open plan + open above where there's an arched roof and was kind of a pain to get right.
Maybe I'll just do a "save as", nuke the wall and see if the problem persists. That would at least tell me if the wall was at issue.
haha, ok that makes it not a room, so I can't do auto dims any more. Ok, even if I draw room dividers around the whole thing, same problem: