If you would like to customize your left hand navigation, you can select up to 20 room or links to move to your favorites section located at the top of the left hand navigation. To favorite a room or link, hover over the link the left hand navigation until you see a star next to the room/link name.
Click on the star, and now your room/link will be added to the favorites section at the top of your left hand navigation. If you do not see your favorites, be sure the caret next to the word "favorites" is pointing down, so that this section is expanded.