Understanding the fire plan of a play

A friend would like me to take care of the lighting management of a theater play but it's not a bad specialty and I don't really understand the technical sheet. Can you help me?

  • on the board, the "m" means memory I think but what do the numbers in "in" and "out" mean?

  • on the document with the light beams, does this represent the position of the beam on the ground or on the back of the stage?

Thank you so much !