Nikon D850 User Manual page 294

f8 Live view button options
Enable
Enable (standby timer active)
Disable
f9 D switch
LCD backlight (D)
D and information display
f10 Assign MB-D18 buttons
Fn button
Fn button + y
AF-ON button
Multi selector
g Movie
g1 Custom control assignment
Preview button
Preview button + y
Fn1 button
Fn1 button + y
Fn2 button
Sub-selector center
Sub-selector center + y
Shutter-release button
g2 Highlight brightness
255–180
270
The a button can be disabled to
prevent live view starting accidentally.
(defaults to LCD backlight (D))
Choose displays illuminated by rotating
the power switch to D.
Choose the functions assigned to the
controls on the optional MB-D18 multi-
power battery pack (0 299).
Choose the roles assigned to camera
controls, either alone or in combination
with the command dials, when the live
view selector is rotated to 1 in live view.
Note that if Record movies is selected
for Shutter-release button, the
shutter-release button cannot be used
for any operation other than recording
movies.
Choose the brightness needed to
trigger the movie highlight display. The
lower the value, the greater the range of
brightnesses that will be shown as
highlights. If 255 is selected, the
highlight display will show only areas
that are potentially overexposed.
(defaults to Enable)
(defaults to 248)