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Canon EOS 40D Guide to Digital Photography by David D. Busch

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C.Fn III-03: Controller Used to Select Autofocus Points Manually

AF point selection method

With this setting, you can customize the controls used to choose an autofocus point manually, perhaps making the selection easier or more intuitive for you, or (as is the default) making this process require the use of two controls so that it can’t be done accidentally.

  • 0: Normal. To change the AF point that is active, you must press the AF point selection button (to the immediate right of the * button), then press the multi-controller button in the direction you’d like to move the active AF point.

  • 1: Multi-controller direct. When this option is chosen, you can select the active AF point with the multi-controller button alone. You can switch back to auto ...

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