Mixing : Basic Mixing : Output Windows for Tracks and Sends : Inverse Linked Panning

Inverse Linked Panning
When linked and set to Inverse mode, panning moves are inverted or reversed in the other channels.
Inverse panning reflects one side’s location and direction in the other side. For example, when enabled for Front Inverse, if you pan one side of a stereo track output from right to left, the other side will exactly mirror that movement and pan left to right.
Front Inverse linking is available on all systems. Rear Inverse, and Front/Rear Inverse linking are available on Pro Tools HD systems only, and only appear as options on multichannel plug-ins and panners/output windows.
To enable inverse linking:
1 Enable the Link icon.
2 Select an Inverse mode.