Social

Friends

Add another player to your friends list to see when they're online and when they're away.

Private messages

Click on a player's name to open a private line to them. Your message goes to them alone, shown as "To Name:" so you can tell it apart from public chat.

Ignore

Add a player to your ignore list to silence them completely, in public chat and in private messages alike.

Following

Right-click another player and choose to follow them, and your character walks wherever they walk.

Trading

Right-click another player and choose to trade. Both of you put items and coins on the table, and both of you have to accept twice — once for the first offer, and again after anything changes — before anything actually changes hands. Nothing moves until both sides have confirmed.