Surround : Surround Panning and Mixing : Panning Modes : AutoGlide Mode

AutoGlide Mode
AutoGlide mode lets you quickly write Surround Panner automation by clicking new locations in the Surround Panner window, instead of manually moving the Surround Panner controls.
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When writing automation in AutoGlide mode, the Pan Location cursor cannot be dragged from its location.
The time it takes to glide from point to point (from the Pan Location cursor to the new destination) is called the AutoGlide Time. This time is set in the Mixing Preferences page and has a range of 10 msec to 10000 msec (10 seconds).
To set the AutoGlide Time
1 Choose Setup > Preferences and click Mixing.
2 Set the AutoGlide Time in the Automation section.
To do an AutoGlide automation pass:
1 Click the Panning Mode button until the AutoGlide mode icon is displayed.
 
The Panning Mode button displays a slanted dotted line that ends with a filled in dot (representing a cursor) at its top right corner.
2 In the Mix or Edit window, click the Automation Mode selector and select an Automation mode for the track you want to automate.
3 Press Play to begin playback.
4 Set a new destination for the cursor by doing one of the following:
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– or – 
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Click in the pan window to glide to a specific location in the X/Y Grid.
The Pan Location cursor will begin to move towards the new destination in the time it takes to travel the AutoGlide Time. When the new destination point is reached, a new breakpoint will be written at the new location.
5 Repeat the previous step if you want to write additional panning moves.
6 Stop the transport when finished.