Nikon D3300 User Manual page 276

3
Recompose the
photograph.
Keeping the A (L) button
pressed, recompose the
photograph and shoot.
A
Adjusting Shutter Speed and Aperture
While exposure lock is in effect, the following settings can be adjusted
without altering the metered value for exposure:
Mode
Programmed auto
Shutter-priority auto
Aperture-priority auto
The metering method itself can not be changed while exposure lock is
in effect.
Shutter speed and aperture (flexible program;
0 103)
Shutter speed
Aperture
Setting
P, S, A, and M Modes 117