In some of my training materials, I need to add thumbnail images of slides for instructors. I figured out what was causing the notes pages to resize (at least in my case). This just started happening within the past few weeks. I also tried turning off all PowerPoint add-ins (I have two). What on earth can cause the Notes Page to just suddenly change dimensions? I looked at my Windows Updates and don’t see any recent Office 2016 updates. It takes a long time to get everything back in shape! (Renaming the file extension from PPTX to ZIP, fixing the dimensions in the appropriate XML file, and then renaming the file back to PPTX.) However, I then have to return to the “fixed” PowerPoint file, fix the size and placement of the placeholders on the Notes Master, and reapply that master to each Notes Page– one at a time–for everything to look as it is supposed to. I found a post on a different explaining how to use the PowerPoint file’s XML capability to reset the Notes Pages size, and this works. The text is still on the Notes Pages, thank goodness.
Suddenly, the default page size for the Notes Pages is changing to a different size–it looks like Legal Portrait size. These files have been “in process” for 1.5 years and I am now finalizing them. I have a series of PowerPoint files for which I’ve added formatted Facilitator Notes using Notes Pages (and the Notes Master to set up the initial formatting).