elseif Current_drawing_mode == 'rectangle' then
    if #drawing.pending.vertices < 2 then
      love.graphics.print("* Press 'p' to add a vertex to the rectangle", Margin_left+30,y)
      y = y + Line_height
    else
      love.graphics.print('* Release the mouse button to finish drawing the rectangle', Margin_left+30,y)
      y = y + Line_height
      love.graphics.print("* Press 'p' to replace the second vertex of the rectangle", Margin_left+30,y)
      y = y + Line_height
    end