A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
I'm not sure if this is a fix or a fluke, but this is what I found that worked:
- Right-click a thumbnail that has a red X
- Hover on Layout
- You may see that some of your layouts have red X's, if so... (and try the next 2 steps even if they don't)
- Note the type of layout of the current slide (title and content, title only, etc.)
- Scroll through the list of available layouts and select a similar layout without an X
In my case, this fixed all the thumbnails that used the same layout. I then repeated the steps for the other slide layouts until all the red X's were gone. I saved my file and reopened it. The fix stuck.
From what I've read of the symptoms, it appears that the file loses the layout info and needs to have the layout reapplied from a similar/identical layout.
If this works for you, please click "Helpful" below so that we know whether it's a fix or a fluke.