System Configuration : I/O Setup : Assigning Paths to Hardware I/O : Reassiging Paths

Reassiging Paths
You can move the individual assignments to different channels, to reorder the path’s definition (for example, changing a multichannel path to L-R-C-LFE-Ls-Rs).
To reassign channels in a path:
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Drag the channel to the new location in the Grid. Other channel assignments move (shuffle) to accommodate dragged channels.
Channel Shuffling
Moving a signal from right to left results in a shuffle of other signals after the new destination channel. Moving a signal from left to right shuffles any and all signals after the new destination channel and leaves the previous channel empty.
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Changing a path’s format erases any current channel assignment.
Sub-Paths Follow Main Paths
When a main path is reassigned, its sub-paths (if any) are reassigned automatically to maintain consistent routing. For example, reassigning a stereo path to different hardware outputs results in any of its sub-paths moving with it.