Originally Posted by esgee48
Returner's partner should be standing just in front of the service line looking back. It's easier to see if there is a different color between the white line and court from that position than when standing behind the service line.
JMO, but if your partner is not calling the service line parallel to the net when you're receiving, then he/she is not doing their job. I normally tell my partners to help me call that line and I would call the line perpendicular to the net.
This may come as a suprise but the returner's partner's job is NOT to call lines, it is to be ready for the potential poach. Wherever they choose to position themselves is their choice and they try their best to call lines from wherever that happens to be.