An "O" consists of dancers occupying the following spots in a 4 x 4 matrix:
| 
 "O" FORMATION   
 
 |   | 
 
 |  | From here... |   | imagine you are here. |   
 | 
An "O" is considered to be Distorted Columns, 
  as if the Centers slid apart from normal Columns.
 
 |   | 
 
 |  | If you are here... |   | think of working in Columns |   
 | 
 
 |   | 
 
 |  before "O" Circulate |   | after
  |   
 | 
| 
 | 
Notes:
- 
For simple calls (such as "O" Circulate, "O" Split Counter Rotate 1/4,
    etc.) move directly to your ending footprints.  For more complex calls, 
    start the call working distorted, blend into a
    normal setup, complete the call normally, and then have the resulting
    Centers move away from the Center to re-establish the "O" footprints.
 - 
If dancers occupy "O" footprints but the caller wishes them to
    work in distorted Parallel Lines, the term 
    Big Block [C3A]
    is used.
 - 
Sometimes the caller wants you to start the call in your "O" but
    finish in a normal setup.  In these cases the caller will add a suffix
    such as 'To Normal Waves', 'To A Line', 'To Columns', etc. 
(e.g., "O" Checkmate To Normal Lines).
 - 
An "O" can also be 
    T-Bone 
    in which case you do your part working in your own set of distorted Columns.
 
 
 |   | 
 
 |   | 
 
 |  | From here... |   | imagine you are here... |   | ... or here. |   
 | 
 
 |   | 
 
 |  before "O" Walk & Dodge |   | after
  |   
 | 
Mini-"O" FORMATION [C1V]:
 A Mini-"O" is a 6-dancer "O" with 2 Centers and 4 Ends.
| 
 Mini-"O" FORMATION   
 
 |   | 
 
 |  | Mini-"O" |   | think of working here |   
 | 
 See also Butterfly FORMATION [C1]
 and Squeeze [C1].