Not without code (which you can't do in OnDemand)
The closest I can think of - add a field of type "user picker" and then change your notification scheme so that it sends mail to anyone in that field. Not quite what you're asking for, but it will have the same effect on mail, just not add them as a "watcher"
...ollected feedback from users around the lack of shortcuts, and we’re here to address that: In next-gen projects, I miss the keyboard shortcuts badly. This is particularly true on the Board, but also i...
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