You just make a trigger activated by west (or east or resistance) and then head stfraight for the effects part of the trigger (bottom of the page).
When you get to the effects part, head once again straight to the bottom and find the liitle section that says "titles".
In the type box put ""text" and in the effect, leave it plain. That means the text will appear in the middle of the screen. "Bottom" put it at the bottom.
Anyway, when you put the "type" box to "text", a little line should have appeared just below. Type your text into that, press ok a couple of times, and your done.