Not sure what you want to see. The boot priority is a number between -127 and +127. DF0 is at 5, DF1 at -10. Your boot partitions should be between that. The one with the highest value will boot. If two drives have the same priority, the one which is found first will boot.
The early startup menu lists all boot drives in their priority order. The topmost will be the boot drive unless you select another one.