Working in Camera RAW I recently discovered an option for exposure adjustment that shows highlight clipping and I need more information
On a PC, while adjusting the exposure slider, if you hold down the Alt key the image display shows the highlight clipping in various colors.
I don't understand exactly what the Alt function actually does or if there are any other key functions available for exposure [or other adjustments].
So far Adobe Help is more useless than I ever remember it being.
Where can I find help with settings like this and others?