From Parallel Lines or other applicable formations.

Centers Trade & Roll as Outsides 1/4 Out, Trade & Veer Out (Press Out).

Parallel Lines end in Facing Lines.

From Parallel Lines:       before Regroup   after Centers Trade as Outsides 1/4 Out   after Centers Roll as Outsides Trade & Veer Out (done)

From Twin Diamonds:       before Regroup   after Centers Trade as Outsides 1/4 Out   after Centers Roll as Outsides Trade & Veer Out (done)

Notes:

• Although Regroup can be done from any Parallel Lines, it is almost always called from Back-to-Back Lines. This is primarily done because of flow considerations for the Outside dancers.
• Outside 4 always end directly facing each other on the Outside.
• The Outsides should pass Right-shoulders with each other. Other glossaries may define the Outsides' part as 1/4 Out & Cross Cast Back [C1] (hence implying a Left-shoulder pass).