Canon EOS-3 Instructions Manual page 115

AEB is not canceled even when the lens is interchanged or when the film
is replaced. Therefore you can keep taking AEB shots (with the standard
exposure first).
You can keep taking AEB shots in this sequence.
This applies during manual focusing point selection and Eye-Control AF.
During automatic focusing point selection, the focusing point does not
light dimly after focus is achieved.
If the flashing of the focusing point is annoying, you can disable it.
This disables the focusing point from lighting dimly after focus is
achieved.
This makes the focusing point easier to see even in bright light.
Remarks
Custom Function Settings
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