The Help window Edit menu contains the following items:

  -  Copy

     Copies a selected portion of text to the clipboard.
     This item is dimmed if you have not selected any
     text.

  -  Select All

     Selects all the text in the current topic. You can
     then use the Copy item to copy that text to the
     clipboard.

  For more information, choose the appropriate menu item
  from the list of additional topics.

1  –  Menus Edit Copy

  The Copy menu item in the Edit menu copies the selected
  portion of text to the clipboard.

  This function is useful for copying details into
  another application, for example, to insert a detail
  from the text into a Calendar timeslot.

  If you want to copy the whole topic, it is quicker to
  use the Select All menu item to select all the text and
  then use the Copy item.

2  –  Menus Edit Select

  The Select All menu item in the Edit menu selects all
  the text in the current help topic.

  You can then copy the topic to the clipboard by using
  the Copy menu item.