Any tricks you can suggest?

Display text lasts based on the number of characters. Add colors to the end to make it longer (waste more string space, though).

I usually just add a bunch of enters until I'm on the 11th line, it makes it display for a pretty long time. So basically, what rockz recommended, I suppose invisible colours would be easier to see than the enters though when you're looking at the trigger. I think that's the only way you could do it besides repeating what is said on the screen.

Ahh, I didn't know this. Thanks!

I suggest you try making the messages shorter and simpler first, then resort to adding to the display time. People in general prefer reading more shorter messages than one big lump of text.