Molly,

            I have never used Google Slides, with or without NVDA, but do feel free to post to the main group, making mention of your topic here, and asking those with experience to take a look.  Here's the direct link to it online:  

having trouble editing google slides with NVDA

            I really appreciate your having directed this question here, but because we have only a subset of the regulars on the main group who've subscribed, there may be some there who could help.  If you do post asking folks to have a look at the Chat Subgroup, I'll lock that topic on the main group right afterward so that replies will come here, where they belong.

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Brian - Windows 10 Home, 64-Bit, Version 1909, Build 18363

The problem with values voting is that it completely puts to the side or totally obviates past performance, the effectiveness of policies proposed, intelligence and judgment — you know, the qualities that actually matter for someone who wants to lead the free world.

     ~ Zareh Delanchian