A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Hi Joe,
Thanks for your query in this community.
I've searched for the issue you described in this community. Please check if the method provided in the following thread help on your side:
Excel: How to make the Home tab “stay put”
How To Get Word 2010 To Open On Home Tab
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If issue persist, please provide us with the following information, so we would understand your current scenario better.
1.Please provide us with a screenshot of your current Office version.
2.Before the issue occur, did you made any changes? How about the other Office Apps, will them open in developer tab by default?
3.If it's convenient for you, could you record a video on this issue and share it to us with a OneDrive link.
Share OneDrive files and folders
Record your screen in PowerPoint
Regards,
Alex Chen