RGB-L Histogram of only the pixels of selected Mask

What problem do you see this solving?

I understand your four levels (see help "about histograms") of histograms, these are great and useful, nevertheless I'm missing a fifth one:

The histogram specifically of only the selected pixels of a given selected level (as an optional histogram).

Such to better identify what I'm doing on the mask, and not having it merged into the full image histogram data.

I'm running CO1 23/6.2.2 up to date on a Win 11 PC, also up to date ;) Sincerely Ivar

When was the last time you were affected by this lack of functionality, or specific tool?

This is particularly useful if you mask covers a small fraction of the full image, then the adjustment effects, only viewed on the full image quality, does not always give you the details to see of you are clipping or overdoing it, here a histogram of the pixels you act on should help controlling your adjustments in more details.