WORD CANNOT SWITCH BETWEEN DISPLAY MODES.
 
You attempted to switch display modes, but your
computer does not have enough memory to make the
switch. Or, you copied Word from another machine
and the video choices you copied do not work for
this machine.
 
■ If memory is low, choose File Close All. Word
  asks you to save open documents, style sheets,
  or glossaries.
■ If you copied Word from another machine, run
  Setup again to prepare Word for use with the
  new machine.
■ Word cannot find a valid SCREEN.VID for your
  video setup.