Surround : Multichannel Tracks and Signal Routing : Paths in Surround Mixes

Paths in Surround Mixes
For more information, see the following topics:
Because Pro Tools provides a flexible routing and submixing environment, you can maximize your system’s available resources by first identifying the elements that you want to pan dynamically and those that can be placed in certain channels only (see Mixing with Paths and Sub-Paths).
Once you have identified these elements in your session, you can use a combination of main and sub-path assignments, and multichannel panning.