The Notes attribute is used to append notes to the lines
  of the output file when you fetch or reserve a generation
  of the element.

  To display the current default Notes attribute, do the
  following:

  1. Pull down the View menu.
  2. Choose the Element View menu item.
  3. Click on the desired element.
  4. Pull down the View menu.
  5. Choose the Expand submenu.
  6. Choose the Attributes menu item.

  If you do not specify this option, CMS will maintain the
  existing notes attribute (that you specified when you
  created or previously modified the element).