Windows Live Messenger allows you to customize the program in many ways, including the display, the sign in process, message delivery, alerts and sounds, file sharing, file transfer, privacy, security, and connection status. To change program options, select a category in the left pane of the Options dialog box, and then select or specify the individual options you want. On the left side of the main Messenger window, tabs provide easy access to commonly used products and services. If the tab you use most often is at the bottom of the list, you can rearrange the tabs to suit your own needs. If the tabs are in the way, you can hide them all together.
Customize Windows Live Messenger
Select Tools, and then click Options.
In the left pane, click Messages.
Select or clear the options to determine how you want messages to appear or be responded to.