if y + math.floor(15*Zoom) > Screen_height then
          return y, screen_line_starting_pos
        end

        if New_foo then print('text: new screen line', y, Screen_height, screen_line_starting_pos) end

      end
      if line_index > Screen_top1.line or pos > Screen_top1.pos then
        if y + math.floor(15*Zoom) >= Screen_height then
          return y, screen_line_starting_pos
        end

    print('down', Cursor1.line, Cursor1.pos, Screen_top1.line, Screen_top1.pos, Screen_bottom1.line, Screen_bottom1.pos)

--?       print('down: cursor at final screen line of its line')

      print('cursor at final screen line of its line')
--?       os.exit(1)

--?           print(Cursor1.pos)

          print(Cursor1.pos)

--?       print(Cursor1.line, Cursor1.pos, Screen_bottom1.line)

--?         print('screen top before:', Screen_top1.line, Screen_top1.pos)

        print('screen top before:', Screen_top1.line, Screen_top1.pos)

--?         print('scroll up preserving cursor')

        print('scroll up preserving cursor')

--?         print('screen top after:', Screen_top1.line, Screen_top1.pos)

        print('screen top after:', Screen_top1.line, Screen_top1.pos)

--?       print('=>', Cursor1.line, Cursor1.pos, Screen_bottom1.line)

--?       print('cursor is NOT at final screen line of its line')

      print('cursor is NOT at final screen line of its line')

--?       print('switching pos of screen line at cursor from '..tostring(screen_line_starting_pos)..' to '..tostring(new_screen_line_starting_pos))

      print('switching pos of screen line at cursor from '..tostring(screen_line_starting_pos)..' to '..tostring(new_screen_line_starting_pos))

--?       print('cursor pos is now '..tostring(Cursor1.pos))

      print('cursor pos is now '..tostring(Cursor1.pos))

--?       print('scroll up preserving cursor')

      print('scroll up preserving cursor')

--?       print('screen top after:', Screen_top1.line, Screen_top1.pos)

      print('screen top after:', Screen_top1.line, Screen_top1.pos)

    print('=>', Cursor1.line, Cursor1.pos, Screen_top1.line, Screen_top1.pos, Screen_bottom1.line, Screen_bottom1.pos)

  print(screen_lines[#screen_lines], Cursor1.pos)

  local cursor_pos_screen_lines = Text.pos_at_start_of_cursor_screen_line()
--?   print('cursor pos '..tostring(Cursor1.pos)..' is on the #'..tostring(cursor_pos_screen_lines)..' screen line down')
  local y = Screen_height - cursor_pos_screen_lines*math.floor(15*Zoom)

  local cursor2 = Text.to2(Cursor1)
  print('cursor pos '..tostring(Cursor1.pos)..' is on the #'..tostring(cursor2.screen_line)..' screen line down')
  local y = Screen_height - cursor2.screen_pos*math.floor(15*Zoom)

--?     print('y', y)

    print('y', y)

--?     print('height:', h)

    print('height:', h)

  if Line[pos1.line].screen_line_starting_pos == nil then

  if Lines[pos1.line].screen_line_starting_pos == nil then

New_foo = true

  love.window.setMode(0, 0)  -- maximize
  Screen_width, Screen_height, Screen_flags = love.window.getMode()
  -- shrink slightly to account for window decoration
  Screen_width = Screen_width-100
  Screen_height = Screen_height-100

--?   love.window.setMode(0, 0)  -- maximize
--?   Screen_width, Screen_height, Screen_flags = love.window.getMode()
--?   -- shrink slightly to account for window decoration
--?   Screen_width = Screen_width-100
--?   Screen_height = Screen_height-100

--?   Screen_width = 120
--?   Screen_height = 200

  Screen_width = 120
  Screen_height = 200

--?   Line_width = 100
  Line_width = math.floor(Screen_width/2/40)*40

  Line_width = 100
--?   Line_width = math.floor(Screen_width/2/40)*40

  if New_foo then print('== draw') end

    if New_foo then print('draw:', line_index, y) end

        if New_foo then print('text') end

        if New_foo then print('aa', y) end

  New_foo = false

  New_foo = true