While we're on the topic, what are some other highly useful tweaks and tips that are assumed knowledge? I think we'll be surprised to see how many people were otherwise unaware.
Does anyone know if we can do 1-step control over AF Area Selection Mode (vs. 2-step control on p. 73)? I want to have a quick way to switch between One-Shot AF (coupled with Single-Point AF) AI Servo AF (associated with AF Point Expansion). With a configured DOF button to toggle (technically not toggling since holding down is AI Servo while releasing is One-Shot) between One-Shot and AI Servo, I want to do similar 1-step toggle between Single-Point AF and AF Point Expansion (or other AF Area modes that are beneficial to AI Servo). Is it possible? Does anyone have other alternatives?
I expect most of us are already well aware of this, but if you aren't, try setting the AF-on button to AF-start and decoupling AF-start from the shutter half press (switch the half-press from AF + metering start to just metering start) - this arrangement is one of the major advantages of the mid and high-end bodies over the Rebels and gives you a great deal more control over AF in use.
I am going to try this to see if it's easier to do AE-Lock and Recompose/AF. I'd imagine your described way is clicking AF-on button to AF first followed by recomposing/half-pressing-shutter to meter, right?