Hi
Do I really have to stop PowerPoint Live in order to share my screen and start PowerPoint Live again after the live demo?
Yes. If you choose to share Power Point Live, then when you want to switch other shared content, you must stop sharing and then share other content. If you don't want to switch between sharing content repeatedly, you can choose to share your entire screen.
Hope this helps! Moreover, if the above is not your scenario or I have misunderstood anything, please correct me and provide us with detailed information about the issue including the screenshot so that we can better understand to further assist you.
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