Nikon D780 DSLR Camera (Body Only) - Manual (Page 569)

523 Menu Guide > Defaults
g2 [ Custom controls ]
[ Preview button ] None
[ Fn button ] None
[ AE-L/AF-L button ] AE/AF lock
[ AF-ON button ] AF-ON
[ Shutter-release button ] Take photos
g3 [ AF speed ] 0
[ When to apply ] Always
g4 [ AF tracking sensitivity ] 4
g5 [ Highlight display ]
[ Display pattern ] Off
[ Highlight display threshold ] 248
Custom Settings menu option Default