The Write Double-Height and Double-Width Line routine writes
    a line of text with double-height and double-width (highwide)
    characters.
    Format
      SMG$PUT_LINE_HIGHWIDE  display-id ,text [,line-advance]
                             [,rendition-set] [,rendition-complement]
                             [,flags] [,character-set]
Additional Information:
explode
extract