Hey Rummy!
I'm not 100% sure what your asking. But i kinda got the idea that you want something to happen when someone reaches a waypoint!
If thats so then its fairly easy mate:
Add a trigger near the wapoint. First you need to sync a link to your waypoint from your trigger, and to do this you simply click on the sync button at the top of your screen and click and drag from one to the other.
Now in the triggers menu we need to change the drop down menu that says end1 or end2 or end3 to "switch", once thats done just put whatever you want to happen into the activation of this trigger
Now when the waypoint is reached the trigger is activated
Cheers
Silver