Feature name? LCD brightness changes when f,s, iso changed

what is the Feature name? LCD brightness changes when f,s, iso changed

1) I have Nex that does this and heard canons do as well, but Nikons don't

2) and being beginner, like this feature. do other folks think the same way?

3) dont think this is called "Live view" - which changes lCD when color/picture quality changes, like vivid, natural etc, like Olympus sz does

thks for help