Nikon D780 DSLR Camera (Body Only) - Manual (Page 651)

605 Menu Guide > A Custom Settings
Choose whether exposure locks when the shutter-release
button is pressed.
The camera continues to meter exposure for a set time after the
shutter-release button is pressed halfway. Choose how long the
camera continues to meter exposure when no operations are
performed.
• The shutter-speed and aperture displays in the control panel
and viewfinder turn off automatically when the standby timer
expires.
c: Timers/AE Lock
c1: Shutter-Release Button AE-L
G button
U A Custom Settings menu
Option Description
O [ On (half press) ]
Pressing the shutter-release button halfway
locks exposure.
P
[ On (burst
mode) ]
Exposure only locks while the shutter-release
button is pressed all the way down.
[ Off ]
Pressing the shutter-release button does not
lock exposure.
c2: Standby Timer
G button U A Custom Settings menu