Nikon D6 Reference Manual page 976

Volume
Adjust beep volume.
Pitch
Choose the pitch of the beep from [High] and [Low].
Touch Controls
G button U B setup menu
Adjust settings for monitor touch controls.
Enable/Disable Touch Controls
Enable or disable touch controls. Select [Playback only] to
enable touch controls in playback mode only.
Glove Mode
Selecting [Enabled] raises the sensitivity of the touch screen,
making it easier to use while wearing gloves.
924 B The Setup Menu: Camera Setup