How does one switch both from Single Point AF to 61 Automatic Selection AF with one button click?
you prgram the DOF button to toggle between 1 shot and servo its awesome
also I enable the 8 assist point focus mode this greatly helps with servo keeper rate
Actually, no - that doesn't do what ET wants. The DOF button toggle (I use the M.Fn2 button on the 1D X for that) switches the AF mode from One Shot to AI Servo but does not switch from single point selection to 61-point auto selection. The AF system will 'track across the frame' only if you're in 61-pt auto selection, but while that allows you to select a starting point if you're in AI Servo, if you're in One Shot the camera does the point selection. ET is looking for a way to switch from (One Shot + single AF point selection) to (AI Servo + 61-point auto selection) with a single button press.
ET, my solution to that issue is to have C2 as (One Shot + single AF point selection) and C3 as (AI Servo + 61-point auto selection) but otherwise with very similar settings (both Av mode, etc., although I have the min shutter set higher in C3). On the 1D X, I have the M.Fn button assigned to switch modes, so it's a one-button press to go into servo + 61-pt, and pressing that same button twice to go back to one-shot + manual select (on the 5DIII, it's a dial turn instead of a button press).