TeamPlay online mode- how do you hot route yourself ?

If you are a receiver or running back..how do you change your route ? Ive also seen someone change mine when I was a receiver...now, keep in mind, I never pick receiver or RB, I always pick (any) unless I pick QB if its open.

but whats the trick ? I dont find the command

I've never played OTP, but it would make sense to me if the QB controlled hot routes.