Nikon D750 DSLR Camera (Body Only) - Manual (Page 326)

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* Default settings restored with Reset custom settings ( 0 326).
f6 Release button to use dial ( 0 365) No
f7 Slot empty release lock ( 0 365) Enable release
f8 Reverse indicators ( 0 366)
f9 Assign movie record button ( 0 366)
Press + command dials None
f10 Assign MB-D16 4 button ( 0 367) AE/AF lock
f11 Assign remote (WR) Fn button ( 0 368) None
g1 Assign Fn button ( 0 370)
Press None
g2 Assign preview button ( 0 372)
Press Index marking
g3 Assign AE-L/AF-L button ( 0 373)
Press AE/AF lock
g4 Assign shutter button ( 0 373) Take photos
Option Default