Nikon D780 DSLR Camera (Body Only) - Manual (Page 128)

82 Camera Controls
The AF-ON button can be used for focus
in autofocus mode.
• You can choose the role assigned to
the
AF-ON button. Use Custom
Settings f3 [ Custom controls ] and g2
[ Custom controls ] in the Custom
Settings menu to choose the roles played by the button
during photography and movie recording, respectively.
Press the A (AE-L/AF-L) button to lock
focus and exposure for photographs
taken using autofocus.
• You can choose the role assigned to
the
A button. Use Custom Settings f3
[ Custom controls ] and g2 [ Custom
controls ] in the Custom Settings menu to choose the roles
played by the button during photography and movie
recording, respectively.
The AF-ON Button
The A Button