How do I use Google Slides or Microsoft PowerPoint for closed captions?
GoTo Webinar does not currently support closed captioning; however, you can leverage Google Slides or Microsoft PowerPoint for real-time closed captions during your session.
Use Google Slides
Use Microsoft PowerPoint
You must be running PowerPoint v16.0.11601.20178 (Windows) or v16.22.127.0 (Mac) to use subtitles.