Working with Design Themes causes Slide Masters to vanish??
I'm working on a course design. I built most of it with one slide master & its layouts. Call that Slide Master A.
Then I added two additional Slide Masters, B and C. I also saved B and C as Design Themes. I was hoping to apply B and C Design Themes to the existing slides made from Slide Master A in order to mix and match elements from all three. (That might not work; I'm still learning the program, so this was an experiment.)
I closed Slide Master View. But when I started to insert a new slide in Slide View, I saw fewer layouts than I expected.
I went back to Slide Master View and discovered that Slide Master A and all its layouts were GONE.
I've tried this twice more and it happened each time. If I add an additional slide master and save it as a Design Theme, Slide Master A vanishes from Slide Master View.
I also tried saving Slide Master A as a Design Theme as well. It didn't help. Slide Master A & its layouts still disappeared when I made an additional slide master and saved it as a Design Theme.
This is baffling and extremely frustrating. I hope someone can help.