Question about histograph in LR CC 13.0.1

[bellevue scott]

I use the RGB values in tethered shoots a lot with a color card. Normally I will shoot a color card and then look at the RGB values of my white and black points on a color card. To see the absolute values, rather than relative values, the "S" key has always worked to toggle soft proofing mode, which lets you see the absolute value. So for example, when toggling S, I can see the white point is 242, 242, 242, instead of something like 80.4, 80.2, 80.4 etc. 

But currently in this version of LR CC, toggling into soft proofing mode doesn't do anything to the histogram. Any idea how I can get that back? I want to see the absolute RGB values in the histogram. 

[Scott_BFAR · Accepted solution]

It appears this has changed recently. Now right click on the histogram and the last option in the menu changes it from absolute value to relative value. Using the S key still toggles from  proofing mode to not proofing mode, whatever that actually does I don't know...