I would kill to be able to select a partial result line and give it a basic formatting variant such as bold or italic, without changing anything about its computation behavior.

Essentially, what "Make subtotal line" does, but without changing the calculation in any way, and maybe with a few options instead of just bold.

This is a bit like another request: https://soulver.canny.io/feature-requests/p/allow-unique-formatting-for-answer-column-items-that-are-not-used-in-total

…but it might be different to the dev's eyes so I'm filing it separately as well as upvoting the other.