Click a friend’s name from the right menu. This will open a small chat window at the bottom of the page. You can send messages to other Facebook members, even if they are not online.
Add more people to your conversation. If you want to create a group chat, click the Friends icon with a “+” sign at the top of the chat window. You can then designate additional people that you want to add to the chat.
Send files through chat. Click the Gear icon and select Add Files. This will open a file browser where you can browse for files on your computer. The file size limit is 15 MB.
Review your past chats. Click the Messaging icon at the top of the Facebook page and then click “See All” at the bottom of the list. This will open your Inbox. Use the left frame to scroll through all of your past messages.
To archive a conversation, hover your cursor over it in the left frame and then click the “X” icon that appears. This will remove the conversation from your Inbox. The conversation will still exist on the Facebook servers.