5.2 The HUD
5.2.1 The chat window
Those little buttons are used to control the chat. Here you can chose what chats you want to read, and what chat you want to write in.
From left to right:
Local chat (the white one; local chat has a range of your radar)
Society chat, the box below is activated, means in that case you can talk in soc chat
Team chat
Event chat
Global messages, if you disable it you can’t read the globals messages anymore
(finally an option to ban all the ppl who starts “10 globals in a row” crafting run )
Skill messages, if you disable it you can’t read the green chat anymore telling you got skills
Damage messages, you neither can read the damage you deal nor the damage dealt to you
“All other messages”, e.g. message someone in your friends list came online, creature doesn’t provider any further sweat

If you get a PM or another message a flashing icon will inform you
When you press return you can type in the chat, press it again to send it.
You can also use “/s” for writing in society chat and “/t” for writing in team chat
(i apologize for using pics here, but the arrows are necessary i think)