Apple Logic Pro 8 - Manual (Page 563)

Chapter 25 Mixing 563
You can create up to 32 groups. Each channel can be a member of multiple groups.
To assign a channel to a group:
1 Click the Group slot to open the Group menu.
2 Choose one of the 32 groups.
When you choose an inactive group number, the Group Settings window will open
automatically (see next section). Individual channels can belong to more than one
group.
To add a channel to an additional group:
m Press Shift while choosing a group in the Group menu.
The Group slot displays all groups a channel is assigned to.
To remove a channel from a group:
1 Click the Group slot to open the Group menu.
2 Choose No Group.
To alter the settings of an active group number:
1 Click the Group slot to open the Group menu.
2 Choose Open Group Settings.
To quickly assign the most recent group setting to another channel strip:
m Press Option and click the Group display of the desired channel strip.
The most recently accessed Group setting—including overlapping groups—will be
applied to the current channel, without opening the Group menu.