On my first (long) night drive home, I had to pull into a rest stop to figure out how to dim the center display. In short, when the center display is in "moon" setting, the main display brightness buttons under the driver display sets the brightness of both displays (driver and center). In the "*" setting, there is a separate brightness slider for the center display. There is a main driver display and the center display (audio system). The brightness of the center display day or night is controlled by two buttons just at the driver display (on either side of the trip odometer center button). only got the right most button lower left this picture. Center display: To control the brightness of the center display, there is a brightness icon lower left (Day/Night) Icon (page 210, owner's manual). *, moon (under the curved "BACK" symbol, lower left) In the upper right of the center display there are three icons *, moon, and off. Pushing on those three icons upper right does nothing (apparently they are just status display indicators). Seems like it might be a relatively easy software fix to change these into active buttons. Pressing the brightness icon lower left (Day/Night) Icon *, moon does two things. It cycles through *, moon, and off, and it brings up a display brightness bar for center display brightness bar which only works in the * mode. In the moon mode, the main display brightness buttons under the driver display controls the brightness of both displays. As an aside, there other display customization settings at display settings through a couple of selections from the home menu.