Log wheels range mask?

When adjusting the low range and high range in the log wheels, is there a way to see a mask of what the range you're adjusting include For instance, holding down a key combo while adjusting the range.

As a workaround, I usually just max out a color on the high or low wheel, adjust the range to effect where I need, then undo the heavy color and make my adjustment. I do this constantly - it would be a nice time saver to be able to quickly see my range as I adjust without those extra steps.

Thanks.