• Locate the My Messages box on the right side of your screen.
• Click on the Mail Options link.
• The Options -- Preferences page will open.
• Customize your mail options to fit your needs.
• Scroll down to the bottom of the page and click on Update Preferences.
• Your preferences will be saved.

You can also access the Options -- Preferences page directly from your Inbox. Just click on the Options link in the green toolbar.