----------------------- 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
  S  delete single character
  X  delete line
  
  R  set a tab
  T  move to tab
  Y  clear a tab

  G  insert ghost hyphen

