Fuel selector

I have an aircraft with 4 fuel tanks. L&R main, and L&R auxillary. How do I make it draw fuel from all 4 tanks at the same time instead of emptying the auxillary tanks first?
(FS9)
(FS9)
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=13&t=34919