Playbooks

Empty Trey clears the backfield entirely, sending the running back out wide and stacking three receivers to one side with a trey alignment (typically two receivers plus the tight end bunched or stacked). Unlike standard Shotgun sets that keep a back in for protection or a checkdown, Empty Trey commits five eligible receivers to the route distribution, which forces the defense to either play a coverage shell with no free hitter over the middle or bring pressure and lose a body in coverage. Your pre-snap read gets dramatically simpler here: count the defenders over the trey side, and if it is two on three, you have an immediate leverage advantage on the strong side stems.
Read the trey side pre-snap: if the defense only has two defenders over three receivers, work Corner Strike, Smash, or Curls Y-Shake to that side and take the leverage throw.
Against single high look, live on the seam attacks (Four Verticals, Go's Y Shake, Y-Post Ohio) and drag the safety with the post before hitting the opposite vertical.
On third and medium, Stick and Curl Flats give you an option route that converts against both man and zone without needing a full progression read.
When you see a blitz look with the box vacated, check to QB Draw or WR Screen so the defense pays for showing pressure out of empty.
Hot route the isolated backside receiver to a slant or drag when you get press man, since he is your fastest read against a free rusher and gives you a one-on-one with no help.