Digital Light & Color

Shift-clicking on an image when Histogram Tool (Mode) is on, will mark the value(s) in the histogram with vertical lines. It's probably me, but I find it difficult to see those lines. I was thinking that, if it's easy to do, maybe marking those lines on the margin with some kind of ticks for example would make them easier to find/see - it's actually probably good that they are thin as the location is more precise, I just can't find them easily...

In a similar vein, I was trying to hold Shift-left mouse painting on an area, expecting that those values will accumulate on the histogram just like the roughness in Advanced Sharpen histogram, but I don't seem to be able to find the right key combination to do that.