Canon EOS-3 manual 112

Custom Function	No.	Setting	Description
		0	Enables all settings to be set in 1/3-stop
			increments.
		1	Enables the shutter speed and aperture
			to be set in full-stop increments, and
Exposure setting	CF-6		exposure compensation and flash
increments			exposure compensation in 1/3-stop
			increments.
		2	Enables all exposure settings to be set in
			half-stop increments.
		0	The lenses listed on the right enable
			electronic manual focusing after AF
			operation.
Electronic manual	CF-7	1	Disables electronic manual focusing after
focusing.			AF operation.
		2	Disables electronic manual focusing at all
			times.
		0	The frame counter counts up.
Frame counter	CF-8	1	The frame counter counts down
display
			(indicates the remaining number of
			frames).

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