Having a description in light gray already on a field (of any type) or maybe if you add a description, having a “?” symbol on the side of the field title, would be great for users to know or understand what they should do or not do.
Timely question! There has been discussion of it, with a proposal just today here: Expose column description · Issue #368 · gristlabs/grist-core · GitHub
I thought about this 4 days ago… maybe I have a double personality ( yohanboniface) that can speak french!! That’s neat, since my second personality is in the World Cup semifinal 
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