Canon EOS Rebel XT Instruction Manual page 186

1£
Set the lens focus mode switch to
<AF>.
Press the
<~ AF>
button.
Turn the <B> dial to select the
AF mode.
ONE SHOT
For still subjects.
AI FOCUS
Switches the AF mode automatically.
AI SERVO
For moving subjects.
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Automatic AF point selection
~
Press the
<EB>
button.
Press the < ...
:~
> keys to select the
desired AF point.
If you try to select an AF point
beyond the top-, bottom-, left-, or
right-most AF point, automatic AF
point selection will be set.
By pressing
<
@
>,
you can toggle
between the center AF point and
automatic AF point selection.
You can also select the AF point
with the <B> dial.