Hiding doesn't complete or delete a track, it simply moves it aside.
Click the [Hide] button on the track window or page view to hide a track at any time.
To find your hidden tracks, you can use the Filter in your track stream and select Hidden. Once filtered, you can see, update, and unhide your hidden tracks at any time.
##Please note that this functionality has changed.
You can now `mute` a track by toggling off the speaker icon in the track to have the same effect as the previous `Hide` functionality. We will be updating our documentation soon.