Whats with the new entity targeting system?

[Dozzy]

I dont understand the new method of activating an entity.
I have tried with lights and sound and nv shake but cannot get a trigger once to activate any of them.
I have read a tutorial which made it sound easy enough, but actually doing it seems a little bit more difficult, plz help.

 

[The Dark Elf]

I dont understand the new method of activating an entity.
I have tried with lights and sound and nv shake but cannot get a trigger once to activate any of them.
I have read a tutorial which made it sound easy enough, but actually doing it seems a little bit more difficult, plz help.

It confused me too but now im playing with it its seeming far simpler than it used to be.

You basically only edit the output from an entity, tell it which entity to target, then tell it what to do, then the last textbox you give the name of something else

check out the sdk example map of the types of props, it shows a trigger being used to open/close a doorway.