EASY POINTS IF RIGHT ABOUT COMPUTER EASY QUESTION (LAPTOP PEOPLE)?

Okay so you know how if you copy lets just say a msn convo and you press the on that says prt sc and sys rq and then you go to paint and you go to edit and then paste its there well with a laptop its different the ons are separate its like insert and underneath it it is prt sc and the other on is delete and underneath it is sys rq how are you suppose to do it PLEASE HELP 10 POINTS