I highlight stuff on the HTML so it stands out. Much of the highlight focus is done for me in the way M+ categorizes things so I don't need AS much.

Most of what I currently highlight helps me not miss things during the FMS load: ETP point coordinates in a field of coordinates, step-climbs in a field of howgozit text, NOTAMS that I want to emphasize during brief or remember in 9 hours (I've got a great memory, but dang, is it short).

Everyone has their technique. I use highlighting to emphasize things to which I want to draw attention. I agree that it needs to be added to M+.