Conductor score marking system

A typical conductor's score is filled with marks in different colored pencils and/or pen, marginalia concerning research, erasures and strike-throughs as a result of rehearsal (and, perhaps, even an "A" or "B" option depending upon the quality level of the players or the acoustics of the space), possibly a seating plan ...

1. How do you mark up a conductor score?
2. What is a conductor score?

How do you mark up a conductor score?

General:

1. Get your own score, make sure it's the same edition the orchestra is working from.
2. Listen to as many recordings of good conductors/orchestras you can; follow along.
3. Get your 'trail markers' marked – measure numbers (at least beginning of every system), circle rehearsal letters, time/tempo changes.

What is a conductor score?

Full/Orchestral/Conductor's Score: Provides notation for all of the instruments and/or voices in an ensemble; parts are arranged in "score order;" conductor's scores are generally the largest and are for use by conductors in a performanc. The larger print enables the conductor to easily read all of the parts.