A family of Microsoft word processing software products for creating web, email, and print documents.
Dear Chris,
Good day!!
I understand you would like to turn off/on the purple graphic boundaries to the edges of the content control and to my knowledge, the purple graphic boundaries can be turned off by disabling the Design Mode in the Developer, but I am sorry to convey that Word app on the Mac doesn’t have the Design Mode to be turned off.
In this scenario on using the Legacy Forms in the Word document on Mac, I suggest you to refer the replies shared by MVP’s in this thread: https://answers.microsoft.com/en-us/msoffice/forum/all/microsoft-word-for-mac-forms-getting-into-and-out/4bdb10ba-c4b6-4278-883b-3e5f3fdcc038
Moreover, I also suggest you add your valuable feedback in the Word Feedback Community: https://feedbackportal.microsoft.com/feedback/forum/fb6d67e3-301c-ec11-b6e7-0022481f8472
Sorry for the inconvenience caused and thanks for your patience.
Have a good day!!
Best Regards,
Sophia