So yeah, I'm thinking Transmissions are better than Display message, but I don't know if Transmissions create wait blocks or not. So does anyone know?

From that information, no it won't.

EDIT:

Transmissions are a Wait, a Display Message, and a Show Unit Portrait all rolled into one. All of which can be used on their own.

No.... there's a Talking Portrait action. What you can't get any other way is the little circle that blinks around the unit.

It also does a minimap ping on the highlighted unit.

PS. The wait time of the transmission action functions exactly the same as a normal wait action.
You can even make hyper triggers with transmissions.

Oh, and they're the only action that makes a highlight circle on a given unit.

Yes they're a wait.

No, from that definition it says it will do the exact same thing a wait does.

If your Hyper Triggers or other wait triggers are below the trigger with the transmission, they should turn off while the transmission runs, or you could use Cross Player Hyper Triggers, which will turn off for the duration of the wait no matter where they are, a tutorial on how to use them is here:

http://Falkoner.CoW.GooglePages.com/Hyper_Triggers.html

What does that have to do with this topic? He has not said a single thing about hyper triggers.

Simple answer: YES!

(Transmission uses the wait action, among others)

Yes, but them causing wait blocks may cause a problem, which is why I said:


So I told him how to get by without wait blocks.