Nikon 5400 - Manual (Page 154)

142
The Setup Menu
Menu Guide
AE-L, AF-L
By default, both focus and exposure are locked
when the AE/AF-L button is pressed. If desired,
the button can be set to lock only one of focus
and exposure.
AE-L & AF-L
AE-L
AF-L
AE-L, AF-L
Option Description
AE-L
AE-L & AF-L Pressing AE/AF-L button locks both focus and exposure.
Pressing AE/AF-L button locks exposure only. Focus locks when shut-
ter-release button is pressed halfway.
AF-L
Pressing AE/AF-L button locks focus only. Exposure locks when shut-
ter-release button is pressed halfway.