[Oberon] PO2013 - System.CloseTrack / System.ExtendDisplay

[Andreas Pirklbauer]

    > How about making it round-robin? Imagine three or more tracks on top of each other.
    > Imagine CTRL-N cycling forward to the "next track", CTRL-B cycling back.

The two commands

   System.NextDisplay     (like CTRL-N)
   System.PrevDisplay     (like CTRL-B)

in EO do exactly that … but with entire (virtual) displays instead of tracks.