Tutorial - Chat Rooms: There is a button labeled "Click to load history" in the chat rooms, right above the text entry field, that allows you to load the history of the conversation from before you joined the room. However, this button is only present if you're in an individual chat room, not if you're using the All In One chat option. If you're using the All In One chat, which combines rooms, this text/button won't be displayed, because the feed will include the chat comments from multiple rooms and the system won't know which chat history it's supposed to load from.