CEED questions newbie

pi-top [1] + pi-topCEED
#1

I’m considering a CEED and had a couple questions:

  1. Can the CEED’s screen be turned off without turning off the Pi ?

  2. Other than the +5V and GND, what do the other pins on the GPIO connector going from the power board (hub?) to the Pi do? Is it documented , What information is traveling between the two boards ?