Hey guys, dunno if this thread exsist, but anyways.
I cant figure out how to enable /all chat on LoL, cant find it in options or anything...
It's in the in-game options...I forget where but do a double check and if you can't find it I will open LoL up to check where it is :P
In the game itself (not the client) hit escape, then go to the "more options" menu. Click the box that says enable all chat and you should be good to go.