The Options Menu

New Window:  produces another Chatter window with it's own independent connection. You can carry on conversations with up to 4 people by creating new Chatter windows and connecting to different users.

Answer Messages:

Chatter can also function as an answering machine. If you select Answer Messages , answering mode will be turned on.
All of the buttons will be grayed out, and the popup menus will be Answering and Mode.  The message “Answering mode ON” will appear in the top text box.. Any existing Chatter connections will be closed, though if this is the case, you will be asked if you want to continue.  

Now any user that connects to you will automatically be sent your Answering Mode message ( see Set Message... below for how to set it ). Any messages they leave can be read out of the top text box.  Note that if more than one user attempts to leave a message at the same time, there will be more than one Chatter window with messages in it.
  To turn off Answering Mode, just select Answering Mode from the Options menu again and uncheck it.  Note that this will also close any existing connections.

Preferences...:

This selection brings up the Preferences dialog box. The first time you run Chatter, a set of default settings are provided.  See the Preferences section  for more information.