i would say just pull up but that might not cut it , you just have to "feel" it .it all depends on the transition the coping the hight how mellow or steep.
but as a rule of thumb
Get some speed that you feel comfortable with, you want to be able to hit the coping of the qauterpipe/halfpipe..
you approach the quarter, bend your knees for extra speed (pump your legs). When you hit the coping retract your knees in a jumping motion
The scariest bit of airing to any new comer to scooter riding, but don't fear with this guide you will pull of this maneuver with ease.
Assuming that you're now in the air, you want to pull the bars up and hold onto them. You now want turn your body in a spinning motion to either your right or left side, you should first find out which you feel comfortable spinning.
Coming back in: All you have to do is keep your knees bent and extend them when you hit the quarter pipe in a pumping motion.
hope that helps