You only need to change the size to what you need, click on "Repeadly" (that makes that the trigger can be activated endless) and write the stuff into the "OnActivation" box.
If you only need the plane one time you should choose "Once".
Nothing more...
For the other stuff in the triggers you should check a (unofficial) command reference.
@LimeCordial: What do you mean...nape?
Greetz
Plage