Nikon D7200 User Manual page 310

f7 Slot empty release lock
Release locked
Enable release
f8 Reverse indicators
f9 Assign movie record button
Press + command dials
f10 Assign MB-D15 4 button
AE/AF lock
AE lock only
AE lock (Hold)
AF lock only
AF-ON
FV lock
Same as camera Fn button
286
Choose whether the shutter can be
released when no memory card is
inserted.
(defaults to
If
exposure indicators in the control panel,
viewfinder, and information display are
displayed with negative values on the
left and positive values on the right.
Select
positive values on the left and negative
values on the right.
Choose the role played by the movie-
record button and command dials
during viewfinder and photo live view.
Choose the function assigned to the
A AE-L/AF-L button on the optional
MB-D15 battery pack.
(defaults to Enable release)
(W) is selected, the
(V) to display
(defaults to AE/AF lock)
)