Nikon D6 Reference Manual page 872

b5: Matrix Metering
Choose whether [Matrix metering] assigns priority to faces
detected by the camera. This setting applies only during
viewfinder photography.
Option
[Face detection
U
on]
[Face detection
V
off]
b6: Center-Weighted Area
When [Center-weighted metering] is selected, the camera
assigns the greatest weight to an area in the center of the
viewfinder when setting exposure. Custom Setting b6 [Center-
weighted area] is used to choose the size of the area given the
greatest weight when [Center-weighted metering] is selected.
•
If a non-CPU or AF-S Fisheye NIKKOR 8–15 mm f/3.5–4.5E ED
lens is attached, the size of the area is fixed at a diameter of
12 mm.
820 A Custom Settings: Fine-Tuning Camera Settings
G button U A Custom Settings menu
Matrix metering assigns priority to faces
detected by the camera.
Matrix metering does not assign priority to faces
detected by the camera.
G button U A Custom Settings menu
Description