My suggestion is that you track the setter because that is the one player who will tend to be doing most of the overlapping. In addition, track the player opposite the setter. Then, know who leads and follows the setter. After that, it is only a matter of experience so that you know which position the setter is coming from and if they are tending to "cheat" by being out of position with the person leading or behind them, or the person directly in front of them.
The only thing that I can tell you is to constantly be studying offensive and defensive alignments so that you get used to seeing them. As you gain experience, the overlaps will be easier to see.
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Jan G. Filip - San Jose, CA
EBVOA Rules Interpreter Emeritus
NCS Volleyball Officials Coordinating Committee Recorder
CIF State Volleyball State Championships Referee (2005), Scorekeeper (2006-2007) & Libero Tracker (2010)
PAVO State Referee (2014) / PAVO Certified Scorekeeper (2014) / PAVO Certified Line Judge (2012)
USAV Junior National Referee (resigned 2013) / USAV National Scorekeeper (2014)
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