Nikon D300s, D300S (Body Only) user manual 298, F9 Release Button to Use Dial

Option		Description
	If Off is selected, the multi selector is used to choose the
	picture displayed during full-frame playback, highlight
	thumbnails, and navigate menus. If On is selected, the main
	command dial can be used to choose the picture displayed
	during full-frame playback, move the cursor left or right during
Menus	thumbnail playback, and move the menu highlight bar up or
and	down. The sub-command dial is used to display additional
playback	photo information in full-frame playback and to move the
	cursor up or down during thumbnail playback. While menus
	are displayed, rotating the sub-command dial right displays
	the sub-menu for the selected option, while rotating it left
	displays the previous menu. To make a selection, press 2, the
	center of the multi selector, or J.
f9: Release Button to Use Dial			Gbutton ➜ ACustom Settings menu

Selecting Yes allows adjustments that are normally made by holding the I, E, M, ISO, QUAL, or WB button and rotating a command dial to be made by rotating the command dial after the button is released (this also applies to the button to which bracketing is currently assigned; 0 295). Setting ends when any of the affected buttons is pressed again or the shutter-release button

is pressed halfway. Except when No limit is selected for Custom Setting c2 Auto meter-off delay or an optional EH-5a or EH-5 AC

adapter is used, setting will also end when the exposure meters turn off.

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