Problem 5D MK III custom button depth of field to AF selection

I changed the DOF button as well but I don't remember any options. I don't think it is possible. In the manual at page 325 they write:
"You can switch the AF mode. In One-Shot AF mode, when you hold
down the button to which this function is assigned, the camera switches
to Al Sen/o AF mode. In the Al Sen/o AF mode, the camera switches to
One-Shot AF mode only while you hold down the button. Convenient
when you need to keep switching between One-Shot AF and Al Sen/o
AF for a subject that keeps moving and stopping."