ok I got my RX last week, and when I first got it i was told the heater didnt switch to hot,,,so

I did the power button and seek up and the lcd displayed ac temp 0 and never changed so that was my first mod to solder up...

BUT while I was messing with the headunit to see what all other things I could hold to display other stats i came across a brightness/dim for lcd itself, i set it i notch below fully bright. It works great like this but Now its a little too bright at night and i cant remember what combo i pushed to get it to that feature.

Is there anyone who knows how to get to the brightness/dim setting on the lcd?