Nikon D810 Product Manual - Page 220

Flash Compensation Flash compensation is used to alter flash output by from -3 EV to +1 EV in increments of 1/3 EV, changing the brightness of the main subject relative to the background. Flash output can be increased to make the main subject appear brighter, or reduced to prevent unwanted highlights or reflections. To choose a value for flash compensation, press the M (Y) button and rotate the sub-command dial until the desired value is displayed in the control panel. In general, choose positive values to make the main subject brighter, negative values to make it darker. M (Y) button Sub-command dial ±0 EV (M (Y) button pressed) -0.3 (-1/3) EV +1.0 EV At values other than ±0.0, a Y icon will be displayed in the control panel and viewfinder after you release the M (Y) button. The current value for flash compensation can be confirmed by pressing the M (Y) button. Normal flash output can be restored by setting flash compensation to ±0.0. Flash compensation is not reset when the camera is turned off. 196