Active quests are tracked directly on the interface by the Quest
Tracker. This is to help streamline the questing progress and make it so
you can easily see the status of each quest you are on without having
to repeatedly open up your Quest Log. To show or hide the Quest Tracker
you can simply click the scroll at the top right-hand corner of the
interface under the compass.
By clicking on the green star next to the
scroll you will cause the quests for all zones to be displayed. This
green star will then turn a blue color, which can be clicked again to
cause the quests for only your current zone to be displayed. You can
also press the large dash that is next to each quest title to hide the
objectives of the quest.