Thanks, but the problem I am reporting is the absence of any information on this item in the help page that appears (URL in my original post) when you click the question mark in the top right of the dialog you show.
The crux of the problem is in the title of this thread: "Missing Help Info on Boot sectors/UEFI Scan". I do know how to run the scan, just not exactly what it does and specifically, whether is accesses firmware on the motherboard or just software images held on disk.