Nikon D780 DSLR Camera (Body Only) - Manual (Page 307)

261 Shooting Settings
A Choosing HDR Mode and Strength via the BKT Button and
Command Dials
When [ HDR (high dynamic range) ] is selected for Custom Setting f3
[ Custom controls ] > [ BKT button ], [ HDR mode ] (Step 2) and [ HDR
strength ] (Step 3) can be selected using the BKT button and command
dials.
• Hold the BKT button and rotate the main
command dial to choose from the following
HDR modes:
a ([ Off ]), 1 ([ On (single
photo) ]), and b ([ On (series) ]).
• When 1 ([ On (single photo) ]) or b ([ On
(series) ]) is selected, you can adjust HDR
strength by holding the BKT button and
rotating the sub-command dial.