Kathleen:
I totally sympathize with your concerns. I have much the same problem on my laptop, PHAT ribbons and more and more web pages with the same sort of "disease". When I have the money, I plug in a 42-49" 4K monitor to my laptop. MUCH better!
MS "improved" those control options out of Windows 10. We no longer have that fine control.
You can work around to recover a little of the control using 3rd party tools like WinAero Tweaker
Change Icons Text Size in Windows 10 – Winaero Tweaker
https://www.tenforums.com/tutorials/19768-change-icons-text-size-windows-10-a.html
This article includes downloadable registry hack files.
https://winaero.com/blog/tootip-text-size-windows-10-version-1703/
This article includes instructions to do manual registry hack
Also recommends Winaero Tweaker tool. I have used it in past.
The problem with these tweaks is that they affect diaply of all programs, not just Office.
You should also submit Feedback directly to MS about this concern
“Official” MS does not pay much attention to this forum. However, you now can send your complaints and feature requests directly to MS developers and managers using the “Feedback” process described in this link:
https://answers.microsoft.com/en-us/windows/forum/windows_10-windows_install/send-feedback-to-ms-developers/506e7654-8ced-405b-911e-c58d8f253069
Please post a share link to your feedback, back here, so other people who find your question will be able to vote for it and add their comments to it.
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