Message Text.
    -------------
    READER WINDOW   = Normal message text.
    READER BORDER   = The Pagebar.
    READER QUOTE    = Quoted lines.
    READER CURSOR   = Character at the cursor pos. (int. editor).
    READER KLUDHIDD = Kludges and hidden lines.
    READER TEARORIG = Tearline and Origin.
    READER BLOCK    = Block color (internal editor).
    READER BTYPE    = Window border type.