When you launch Blackboard IM, the login window appears. Enter the Blackboard IM ID and password that you chose when creating your account and click Sign in.
Select Remember me to have Blackboard IM remember your Blackboard IM ID and password.
Select Sign in automatically to have Blackboard IM automatically sign you in when you launch the program. You can change this setting in the Preferences window.
Keep in mind, if you select one of these options, anyone with access to your computer can access your Blackboard IM account.