Sessions & Tracks : Tracks : Track List : Track List Menu

Track List Menu
The pop-up menu at the top of the Track List provides commands that allow you to show or hide all tracks, tracks currently selected on-screen, or specific types of tracks (audio, Auxiliary Input, Master Fader, MIDI, Instrument, VCA Master, or Inactive tracks).
 
The Sort Tracks By command lets you set the track order according to Name, Type, Edit Group, Mix Group, or Voice. The sort order will be reflected in the Track List in the Mix, Edit, MIDI Editor, and Score Editor windows.
 
When a track that is a member of an active group is hidden from view, editing operations performed on other members of the group in the Edit window will not affect the hidden track. In the Mix window, however, all operations other than record-enable will affect a hidden track that is a member of an active group.
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With Pro Tools HD, even if a track is hidden from view, its position relative to other tracks still affects its voiceable track playback priority (see Voice Borrowing for details).
The options in the Track List menu in the Score Editor window are different from the Mix, Edit, and MIDI Editor windows. For more information, see Track List.