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Canon® EOS Rebel XSi/450D Guide to Digital SLR Photography by David D. Busch

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Custom Functions I/II/III/IV

Custom Functions, the first choice in the Set-up 3 menu, let you customize the behavior of your camera in a variety of different ways, ranging from whether or not the flash fires automatically to the function carried out when the Set button is pressed. If you don’t like the default way the camera carries out a particular task, you just may be able to do something about it. You can find the Custom Functions in their own screen with 13 choices, divided into four groups of settings: Exposure (I, C. Fn 01 and 02); Image (II, C. Fn 03–06); Auto focus/Drive (III C. Fn 07–09); and Operation/Others (IV, C. Fn. 09–13). The Roman numeral divisions within a single screen with a single line of choices seem odd until you realize ...

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