Reading from Camera, I'll have to go back and see what ll these mean:
Custom Functions: (if it's not listed, it is at 0 Zero)
02-1 ( Shutter Release Without Card NO)
04-1 ( Shutter half press = AE lock, * Button = AF ON )
05-1 ( Puts AV button on the shutter finger dial when in manual. So if you shoot a lot of AV, it does not get reversed)
08-1 ( LCD Display ISO/Remaining shots )
13-1 ( Limits choice of single AF points to 11 / Links spot metering to the Active AF point )
17-1 ( Expand Active AF point to surrounding 7. I go back and forth on this from 13, 7 to "0" single AF point. Many don't agree with me on this, but for birding keeping a single AF point on a fast flying bird is near impossible. Using expansion lets the 1D's fantastic AF system keep your bird in focus when you can't. Learn to use this feature, don't ignore it! This one setting was the one I adjusted the most in CF,. always wished it was as easy to change as aperture and AF point. With the 5D3 it is!)
18-2 (Switch to Registered AF point when pressing [X] (WB thumb button) Here is another huge one. Set registered AF point as ALL 45! (often called "ring of fire") When you need a single af point, you can select it easily, as when you need a single AF point, you usually aren't in a rush. I start every shoot with single center AF point active, selected manually, usually with expansion on. when I need to select another point, I do, but when the sh!t hits the fan, and you need all 45 for a hail Mary shot, just move your thumb from * to [X] and bam you have instant one button access to Ring Of Fire for all your hail Mary needs.
19-4 ( Use AF stop button on Super telephotos so equipped to instead swap between AI servo and One Shot. Not important, just a personal preference.)
20-1 ( AI Servo tracking sensitivity set to 1 = slow. This is another that you may have to change for different applications. Set to slow is to prevent the AI-servo from jumping form near to far focus too quickly, when you lose your subject. This is specifically useful for BIF against a busy back ground. I know it sounds counter-intuitive, but you don't want the camera jumping to the back ground when you lose the bird for a fraction of a second.
Pfn 19-ON! (this tells the camera NOT to "hunt" when AF is lost. For BIF, this means that instead of letting the lens go on a long slow hunt when you lose AF lock, just lift thumb off of * and press again to regain AF lock,. your lens will be in the right neighborhood instead of way off at infinity or MFD)
pfn 17-OFF AF point auto select turned off
pfn 18 cfn 11-2: Auto AF point sel.
pfn 19-ON set continuous shooting speed. l3 h6
pfn 25- ON default settings when cleared
ex AV Partial Metering RAW
AF AI-servo Center F point Low speed auto drive
Parameter set 1
Color matrix Standard
I'm going to add this to the old 1D MkII thread.