Work through this in order
- Keep a copy of the PPTX.
- Open the PPTX Speaker Notes Viewer.
- Select the deck and check for notesSlide parts.
- Review text while ignoring slide-number/footer placeholders.
- Inspect slides in the slide-text viewer for context.
Use the matching tool
Inspect a local copy with PPTX Speaker Notes Viewer. After the check, save or repair files only using trusted software that supports the format.