Not PBS. Line bidding through a sorting system called adopt. Line improvement windows each month that levels the playing field in relation to seniority. If you are a junior line holder, you can "improve" your line to be something better than what you were awarded in the monthly bid results. Reserve is reserve. Not much control over your schedule on reserve however you do have an "aggressive" pickup window prior to your block of reserve days if you don't already have a trip assigned by scheduling.