
Hi Raleigh, this is Kimberly, an independent advisor, I'm glad to assist you today.
In any Office app (PowerPoint, Word, Excel):
Go to File → Options → Advanced
Scroll to Pen settings
Uncheck: Use pen to select and interact with content by default
Save and restart the app.
or temporarily disable touch or pen in Windows
Turn off the tablet or touch device, or temporarily disable touch input:
Open Settings → Devices → Pen & Windows Ink
Toggle off options like Ignore touch input when using pen
Or disable touch display/peripherals, then relaunch Office.
Should you have questions, please let me know.
Best regards,
Kimberly