Nikon D6 Reference Manual page 813

Role Played by Card in Slot 2
Choose the role played by the card in Slot 2 when two memory
cards are inserted in the camera. For more information, see
"Using Two Memory Cards" ( 0 308).
Image Area
Adjust image area settings. For more information, see
"Adjusting Image Area Settings" ( 0 136).
Image Quality
Choose a file format for photographs. For more information, see
"Adjusting Image Quality" ( 0 142).
G button U C photo shooting menu
G button U C photo shooting menu
G button U C photo shooting menu
C The Photo Shooting Menu: Shooting Options 761