Facebook chat is one of the most popular ways to connect with your friends while you are logged in and the person whom you want to chat with is also available at the same time. One the very right hand side of the Facebook homepage, if we scroll down there is the online people visible at the instant. The green icon with them shows that they are available to chat. In an exception, if you want to be visible as unavailable and offline, there options which you can select. In this mode you are unable to chat to any of the persons available at that time.
Facebook chat is being updated from time to time by the Facebook authorities. In the former chat session if you chatted with a person it was never saved and was automatically deleted if the chat box was crossed or when the chatting session ended.
For some people it was a disadvantage because there valuable information was gone and to keep it safe it had to be saved along. But for some people it was a huge advantage that their chat box cleared themselves and they had no privacy issues.
The latest Facebook chat application saves your every single chat that is done by you and the other person, your every chat history is saved side by side automatically. It can be found by the name of the person with whom you were chatting under the messages drop down option. In this application you can even send message to the person from his chat box even if he currently offline.
This app has also a side bar where all of you friend list is visible and those who re online, there is a green icon along with their name. This is not liked by the people as it takes time to search online friends.
thanks facebook!