Replace the first Arm Turn 1/2 of the given call with an Arm Turn 3/4.
|  | 
| |   |  |   |  | før Yo-Yo Cross fire
 |  | efter Centers Arm Turn 3/4 & Extend
 mens Ends Cross Fold
  (færdig)  | 
 | 
|  | 
Noter:
- 
The Arm Turn 1/2 that is being replaced does not have to be
    the first part of the call: it just has to be the first Arm Turn 1/2
    within the given call.  For example (from Facing Lines),
    a Yo-Yo Square Chain Thru 
    is a Right Pull By, 1/4 In & Left Touch; Left Arm Turn 3/4; 
    Centers Trade; Left Turn Thru.
- 
Historically, Yo-Yo was not a CONCEPT, but several different
    calls which used the words Yo-Yo and the Arm Turn 3/4 idea.
    This was not only messy, but confusing to the dancers, since calls
    were named Relay The Yo-Yo (Yo-Yo Relay The Top); Alter The Yo-Yo
    (Yo-Yo Alter The Wave); Change The Yo-Yo (Yo-Yo Change The Wave);
    Reverse The Yo-Yo (Yo-Yo Reverse The Top); etc.  Each call had to be
    separately memorized.