Nikon D3300 - Manual (Page 272)

252 B The Setup Menu: Camera Setup
❚❚ Assign AE-L/AF-L Button
Choose the role played by the A (L)
button.
❚❚ Shutter-Release Button AE-L
If On is selected, exposure will lock when the shutter-release
button is pressed halfway.
Option Description
B AE/AF lock
Focus and exposure lock while the A (L) button
is pressed.
C AE lock only
Exposure locks while the A (L) button is
pressed.
E AE lock (Hold)
Exposure locks when the A (L) button is
pressed, and remains locked until the button is
pressed a second time or the standby timer
expires.
F AF lock only Focus locks while the A (L) button is pressed.
A AF-ON
The A (L) button initiates autofocus. The
shutter-release button can not be used to focus.
A (L) button