Nikon D3400 Triple Lens Parent's Kit Owner's Manual

Page of 526
100 P, S, A, and M Modes
A
Flexible Program
In mode P, different combinations of shutter speed and aperture can 
be selected by rotating the command dial (“flexible program”). Rotate 
the dial right for large apertures (low f-numbers) and fast shutter 
speeds, left for small apertures (high f-numbers) and slow shutter 
speeds. All combinations produce the same exposure.
Rotate right to blur background details or 
freeze motion.
Command dial
Rotate left to increase depth of field or blur 
motion.
While flexible program is in effect, a 
U (R) 
indicator appears in the viewfinder and 
information display. To restore default 
shutter speed and aperture settings, rotate 
the command dial until the indicator is no 
longer displayed, choose another mode, or 
turn the camera off.