How To Change Presnap Qb Vision? Options

[dsenart]

OK i know if the qb has snapped the ball you hit the right thumbstick and it lets you adjust your vision.

What I need to know is how to make him look at a different receiver before the play is snapped.. For example lets say im in a 4 WR set so WR 1 WR 2 WR 3 WR 4, and 1 2 3 are all yellow routes and 4 is the orange route, this means my QB is looking at WR 4 by default when the play starts, I need to know how I can make him look at other receivers instead sometimes when I call a play I want a certain route ran so I don't want it to go to the guy they picked as the "Default" I changed it once but don't know how I did it. If anyone can help i would appreciate it.

Thanks

DSenart