Red (R) is on defense. Blue (B) is on offense. R is running Texas forcing forehand.
Notice how the force is forehand, but 2R pulls over to help because the open lane is on the break side of the stack
If the disc swings to 7B, 2R needs to see this happening and shift back over to the open side
1B cuts under and 2R and 4R must communicate who is picking up. In this case, 4R takes 1B
2R needs to be ready to pick up the next under (2B).
1B goes deep. 4R and 1R communicate that 1R will pick them up.