Canon EOS 1D MkII Instruction Manual page 85

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If automatic AF point selection (p.68) has been set, all the AF points that
achieve focus will light.
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d stands for Program.
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AE stands for Auto Exposure.
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If the focus confirmation light <
picture cannot be taken.
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You can freely change the shutter speed and aperture combination
(program) while retaining the same exposure. This is called program shift.
To shift the program, press the shutter button halfway and turn the <
dial until the desired shutter speed or aperture is displayed.
After you take the picture, the program shift will be canceled.
30
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If " " and the maximum aperture blink, it indicates
underexposure. Increase the ISO speed. Or use
flash.
8000
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If " " and the minimum aperture blink, it indicates
overexposure. Decrease the ISO speed. Or attach a
neutral density filter to the lens.
o
> blinks, the shutter will lock and a
6
>
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