The Remove Generation... menu item removes one or more
  element generations from one or more classes.

  Remove Generation does not delete the generation from the
  library, but removes the association between the
  generation and the class.

  To remove one element generation from a class and replace
  it with another generation of the same element, use the
  Insert Generation... menu item with the Supersede if
  Present button.

1  –  Rmsf

  If you click on an object or objects before choosing
  the Remove Generation... menu item, the Selected box
  contains those objects.  CMS performs the remove
  transaction on the selected objects.

2  –  Rmig

  Fill in the Element field with the name of one or more
  objects whose generations are to be removed from the
  class.

  The object can be an element name, a group name, a
  wildcard expression, or a list of these separated by
  commas.

3  –  Rmgf

  Fill in the Generation field with the generation number
  to be removed from the class.

  The generation must exist in the class.

  If you use a wildcard or a list of class names, CMS
  deletes the particular generation from each specified
  class.

4  –  Rmf

  Fill in the Class field with the name of the class
  expression from which the element generation is to be
  removed.

  The class expression can be a class name, a wildcard
  expression, or a list of these separated by commas.

5  –  Rmr

  Fill in the Remark field with text to be associated with
  the transaction and logged in the history file with this
  remove transaction.

6  –  Rmif

  Click on the Remove if Present button to direct CMS to
  remove any generation of the element that exists in the
  class.

  If the class does not contain a generation from the
  element, CMS takes no action and does not return an
  error.