---------------- CONTROL COMMANDS ---------------

  P  page status                  U   Underline
  N  name the last error          O   Overline
  V  View/hide character mods     I   Superscript
  F  Format command display       K   Subscript
  ^  Upper case lock              B   Boldface
  A  Assistance
  W  delete word
  D  delete single character
  X  delete line
  R  set a tab
  T  move to tab
  Y  clear a tab
  G  insert ghost hyphen
