The different forms of chat indicate what audience you're speaking to. Direct chat would be anyone approx 50 or so meters near you. Vehicle chat restricts the chat to anyone currently occupied in the same vehicle as you are. Side chat is a global chat in which every player can see. To switch between the different forms of chat you press the period key. ( . ) It's always recommended you try and use the most secluded chats possible to avoid people finding out important information. Otherwise, if you're talking on side chat don't reveal important info. If you want to play download Dayz Commander and then send me an inbox message here and I will help you out.