Best practices for applying an updated theme
I'm often making changes to my design theme as I add new course features. When I apply it to my many course modules, I often get several versions of the same theme applied to different slides (see attached image). I have to go in and change many slides over to the 'new' theme's layouts--even though the theme and layout names have not changed.
Phil Major's suggestion of adding a distinctive object to the previous masters/layouts to see where they're being used is a huge help in this (I use a large star shape that extends beyond the layout's borders).
Whenever an updated theme is applied, this conversion process can take a great deal of time. Is there some way I can have the project recognize an update to a theme, and not use two or more versions of the same theme?
Any suggestions will be greatly appreciated.