I'm pretty new to reading sheet music, though I can do it well enough. I've been able to play up to ear by now, and I realized to take it to the next level I should really learn how to read sheet music. Anyway, I've pretty much learned all there is to know save one thing I keep running into.
What does it mean when there is one chord above the other above the Treble Cleff? I'm looking at it right now, and it says to play Cminor over Eflat.