Only on SGIs they do the following:

  O > F12KEY  Print this
  O > F1KEY   Toggles stereo on/off
  O > F2KEY   Toggles black-window
  O > F3KEY   Resets stereo parameters
  O > F5KEY   Toggles mode-setting
  O > F6KEY   Toggles dial-box
  O > F7KEY   Toggles trackball
  O > F8KEY   Toggles text
  O > F9KEY   Toggles side by side stereo
  O > F10KEY  Toggles autospin