Your in game chat feature is inside a tab on the left hand side of the screen:
The red number says there are 10 messages unread this login that can be read.
You can private message somebody by typing @’Their account name’ then your message. There is also a Guild Chat function where you can talk amongst your Guild, useful for organising Team Dungeons or Boss Fights.
The Chat function is quite poor however. It has a character restriction, censors out a lot of words and phrases and seems to have issues with lag regularly. Due to this most Guilds use a chat application for inter Guild communication.
Line App is the most commonly used one and the recommended one. It is free!
If you’d like to talk to us on line, add: