Canon EOS 60D - Manual (Page 255)

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3 Custom Function SettingsN
C.Fn II -3 Highlight tone priority
0: Disable
1: Enable
Improves the highlight detail. The dynamic range is expanded from the
standard 18% gray to bright highlights. The gradation between the grays
and highlights becomes smoother.
C.Fn III: Autofocus/Drive
C.Fn III -1 Lens drive when AF impossible
If autofocus is executed, but focus cannot be achieved, the camera can
either keep trying to focus or stop.
0: Continue focus search
1: Stop focus search
Prevents the camera from becoming grossly out of focus as it attempts
to focus again. Especially convenient with super telephoto lenses which
can become extremely out of focus.
C.Fn III -2 AF point selection method
0: SActivate AF selection / 9Select AF point
You can press the <S> button, then select the AF point directly with
<9>.
1: SAuto selection / 9Manual selection
Pressing the <S> button will set automatic AF point selection. To
select the AF point manually, you can use <9> without first pressing
the <S> button.
With setting 1, the Auto Lighting Optimizer (p.101) is automatically set to
[Disable] and the setting cannot be changed.
With setting 1, noise may become slightly more pronounced than usual.
With setting 1, the settable range will be ISO 200 - 6400.
Also, the <A> icon will be displayed on the LCD panel and in the
viewfinder when highlight tone priority is enabled.
With setting 1, the C.Fn IV -2 [Assign SET button] setting will be disabled.