Nikon Nikon Df Product Manual - Page 285

Option K Playback None Description Fn button performs same function as K button. Select when using a telephoto lens or in other circumstances in which it is difficult to operate the K button with your left hand. Pressing the button has no effect. A Incompatible Options If the option selected for Press can not be used in combination with the option selected for Press + command dials, a message will be displayed and whichever of Press or Press + command dials was selected first will be set to None. A Viewfinder Virtual Horizon When Viewfinder virtual horizon is selected for Custom Setting f4 (Assign Fn button) > Press, pressing the Fn button converts the exposure indicator in the viewfinder to a roll display. Press the button again to restore the indicator to its normal function. Camera tilted right Camera level Camera tilted left Viewfinder Note that the display may not be accurate when the camera is tilted at a sharp angle forward or back. For a display that shows both pitch and roll, use the Virtual horizon option in the setup menu (0 282). U 265