Training in fast contra-pass passing has a great value.
The player running in will become a natural CR or screener.
Then she can move out and become CB in the next training pass.

The CB is contra played from the other backcourt, and has 2 passing possibilities:
1. Across the field to the other wing or
2. To her own wing.

In a game situation there will be other possibilities also.
Markings for training in screening are done with 2 cones.
The exercise must be practiced in both sides.