Sessions & Tracks : Grouping Tracks : Grouping Tracks : Selectable Group Attributes

Selectable Group Attributes
You can select which parameters, or attributes, are linked in groups by the following methods:
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By making the group an Edit Group, a Mix Group, or both (Mix/Edit Group).
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With Mix and Mix/Edit Groups, by selecting from a list of attributes for the group.
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With Mix Groups in Pro Tools HD and Pro Tools with Complete Production Toolkit only, by choosing whether the selected attributes apply globally to all groups or to individual groups.
Linking Mix and Edit Groupings
The Link Mix and Edit Group Enables option links group enabling between the Mix and Edit windows.
Pro Tools allows you to create groups that are both Mix and Edit Groups, but in some cases you may prefer not to link enabling of Mix and Edit Groups. For example, when you are using the Mix window for mixing, you may prefer to work with large, nested groups. However, in the Edit window or a MIDI Editor window, you may want to perform editing tasks within a smaller group. Disabling the Link Mix and Edit Group Enables preference lets you work with different groups in the two windows.
To unlink Mix and Edit Groups:
1 Choose Setup > Preferences and click Mixing.
2 Deselect the Link Mix and Edit Group Enables option.
3 Click OK.