Hi, thanks again. Good to know they are default stops and good to know others find them hard to get rid of!
I tried your suggestion and have been able to clear them, which is great for new docs but not ideal for the completed presentation I'm working on, as I just wanted to a clear a single stop which was causing a line break.
Anyway, now I know how to monkey around with Slide Master to remove, so I'll see what I can do from there.... thanks v much for the multiple assists.