Canon EOS 1D Instructions Manual page 83

Exposure Warnings
If the shutter speed or aperture blinks, it means a correct exposure cannot be
obtained. Although the picture can be taken, it may come out too bright or too dark.
For details, see "Exposure Warning List" on page 157.
•
The AF point which achieves focus flashes briefly. If the AF point has been
selected manually (→p.65), it will light dimly while it is active for (
•
If automatic AF point selection (→p.65) has been set, all the AF points that
achieve focus will light.
Shifting the Program
In the Program AE < > mode, you can freely change the shutter speed and
aperture combination (program) set by the camera while retaining the same
exposure value. This is called shifting the program.
To shift the program, press the shutter button halfway and turn the <
the desired shutter speed or aperture is displayed.
Program AE
).
> dial until
5
83