A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Hi ssl12345,
Note: If you have received an email to let you call a phone number, just ignore it as it's SPAM. The SPAM has been deleted and the sender has been reported.
Back to the topic:
I would like to suggest you use the Option + Shift + Command + V to paste and check whether this can fulfill your requirements. Per my tests, this can eliminate the size and highlight of the font.
Besides, from Feedback by UserVoice of OneNote for Mac, I find the idea of "Specify a Default Paste Option" and suggest you and users who have similar demands vote for the idea. The more users vote, the more likely this feature will attract developers' attention, it will benefit more users once this idea can be accepted by the product team.
We appreciate your feedback and understanding.
Best Regards,
Hugo