Nikon D3300 - Exposure Compensation

118 P, S, A, and M Modes
Exposure Compensation
Exposure compensation is used to alter exposure from the value
suggested by the camera, making pictures brighter or darker
(0 345). It is most effective when used with M (Center-
weighted metering) or N (Spot metering) (0 114).
–1 EV No exposure
compensation
+1 EV