Nikon D6 Reference Manual page 785

Playback Display Options
Choose whether the focus points used when the photograph
was taken are displayed during full-frame playback. You can
also choose the types of photo information that can be viewed
during full-frame playback.
•
The shooting data displayed when [Shooting data] is selected
can be chosen using [Detailed shooting data].
• Highlight options and press 2 to select ( M ) or deselect ( U ).
•
To complete the operation, press J .
G button U D playback menu
D The Playback Menu: Managing Images 733