--?   print('draw')

  if Surface.dirty then
    print(('draw from surface y of %d'):format(Display_settings.y))
  end

            print(('adjusting pane top %d; screen_top is at line %d (max %d)'):format(pane.top, pane.screen_top1.line, #pane.lines))

            print(('%d,%d: adjusting pane top %d; screen_top is at line %d (max %d)'):format(column_index, pane_index, pane.top, pane.screen_top1.line, #pane.lines))

            print(('pane top is now %d'):format(pane.top))

    print(('%s pressed in editor pane'):format(chord))