Canon EOS 1D Instruction Manual page 175

C.Fn IV -6
0: Normal
1: Reverse direction
The dial's turning direction for setting the shutter speed and aperture can be
reversed.
In the manual exposure mode, the direction of the <6> and <5> dials
will be reversed. In other shooting modes, the <6> dial will be reversed.
The direction of the <5> dial will be the same in the manual exposure
mode and for setting exposure compensation.
C.Fn IV -7
0: Disable
1: Enable
You can set the aperture setting with the camera even when a lens is not
attached. Convenient especially if you use a super telephoto lens with
more than one EOS-1D Mark III camera body.
C.Fn IV -8
When you press the <B> button to set the white balance, memory
card, or image size, you can choose to do it with the rear LCD panel or with
the menu screen.
0: Rear LCD panel
1: LCD monitor
When you press the <B> button, the menu screen will appear. Each
time you press the button, the screen will change for the White balance,
Image size, and Record func+media/folder sel.
Even with setting 1, if you press the <B> button during Live View
shooting, you can set the settings above while looking at the rear LCD
panel.
C.Fn IV -9
0: Protect (holding:sound rec.)
Press the <H> button for 2 sec. and the sound recording will start.
1: Sound rec. (protect:disable)
To start the sound recording, press the <H> button. To protect an
image, use the [3 Protect images] menu.
Dial direction during Tv/Av
Av setting without lens
WB + media/image size setting
H button function
3 Custom Function Settings
175