Interpreters need to see the speakers, the meeting room and, in particular, the screens used during a conference. Indeed, body language and gestures are an integral part of any discourse and need to be taken in by the interpreter in order to fully understand a speaker. The reaction of an audience, the expressions on participants' faces, the goings and comings in the room, are all part of the message the interpreter needs for his/her job. This is why the location of the booths is so important. They must be placed so that the interpreters, from their seats, can see the rostrum, the speakers, the screens and as much as possible of the room.