From applicable formations consisting of more than 4 dancers.
  
  - Those who can Right Arm Turn 1/4 (or 3/4);
 
  - Those who meet and can Left Arm Turn 1/2.
 
This is a 2-part call.
Notes:
- 
Start with the Right-hand, unless the caller explicitly 
    says the word 'Left'.
 - 
Grand 1/4 (or 3/4) Thru is to 1/4 (or 3/4) Thru 
    as Grand Swing Thru is to Swing Thru.
    Grand means that dancers can work outside of their 4-dancer sub-formation.
 - 
From R-H Columns, the caller could call either 1/4 Thru or
    Grand 1/4 Thru.
  - On 1/4 Thru, dancers stay in their group of 4 
        (without crossing the center of the set).
 
  - On Grand 1/4 Thru, the Very Center Two dancers also Left Arm 1/2.
 
 - 
Those doing each part of the call should be in a Mini-Wave, not facing dancers. 
    Most callers believe it is inappropriate to call Grand 1/4 (or 3/4) Thru 
    from a setup such as a Grand Single Eight Chain Thru.
 - 
From a Thar or Alamo-Ring, the word 'Grand' is not used, 
    even though the formation consists of more than 4 dancers.  
    Historically, callers have called these variations as
    All Eight 1/4 (or 3/4) Thru, or just plain 1/4 (or 3/4) Thru.
 
Grand Left 1/4 (or 3/4) Thru [A1]:
 Those who can Left Arm Turn 1/4 (or 3/4);
  those who meet and can Right Arm Turn 1/2.
Any Hand Grand 1/4 (or 3/4) Thru [A1]:
 From applicable formations (e.g., Magic Columns).
  Those who can Arm Turn 1/4 (by either hand);
  those who meet Trade.  The Trade can be either an Arm Turn 1/2 (from a Mini-Wave)
  or a Partner Trade (from a Couple).
1/4 (or 3/4) Thru [A1] (Dick Bayer and Holman Hudspeth 1969):
 From a R-H Mini-Wave Box, a R-H Facing Diamond (Centers with 
  R-H, Ends with L-H), or
  other applicable formations.
  Those who can Right Arm Turn 1/4 (or 3/4);
  those who meet and can Left Arm Turn 1/2.
  Ends in a Wave.
 See also Grand Follow Your Neighbor [A1].