Sessions & Tracks : Grouping Tracks : Group Controls : The Group List

The Group List
The Pro Tools track grouping functions are located at the left side of the Mix, Edit, and MIDI Editor windows in the Group List. This scrolling window contains the names of all the groups in your session, as well as a pop-up menu for accessing grouping commands. From this menu, you can select and enable groups.
By default, every session has a group named All, which includes every track in the session. The All group cannot be edited or deleted.
Show/Hide Track List/Group List View Button
To show the Group List (and Track List):
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Click the Show/Hide Track List/Group List View button in the Mix, Edit, or MIDI Editor window.
Group ID
To the left of each name in the Group List is a letter denoting its Group ID (“a” through “z”).
Group Symbols
To the left of each Group ID (“a” through “z”) is a symbol indicating whether that group is selected in the current window (either the Mix or Edit window). There are three types of Group symbols, as shown in the following figure:
The Group symbols indicate the following:
Filled-in Circle
Indicates that all members of the group are currently selected, and no members from outside the group are selected.
Hollow Circle
Indicates that only some members of the group are currently selected.
Circle with a Dot
Indicates that all members of the group are currently selected, plus additional members outside the group.
Group List Menu
The pop-up menu at the top of the Group List provides the following commands:
New Group
Executes the Track > Group command.
Display
Provides commands to show Edit groups only, Mix groups only, or all groups (Edit, Mix, and Mix/Edit).
Suspend All Groups
Suspends group behavior for all Mix and Edit groups.
Modify Groups
Opens Group dialog to modify existing groups only.
Delete Active Groups
Deletes only currently active groups.