Describir: Instructions for the use of Lawson perspective charts

  _____     _____     _  _     _____     ______    _____     ______   _    _   
 /  ___||  |  ___||  | \| ||  |  ___||  /_   _//  |  ___||  /_____// | || | || 
| // __    | ||__    |  ' ||  | ||__    `-| |,-   | ||__    `____ `  | || | || 
| \\_\ ||  | ||__    | .  ||  | ||__      | ||    | ||__    /___//   | \\_/ || 
 \____//   |_____||  |_|\_||  |_____||    |_||    |_____||  `__ `     \____//  
  `---`    `-----`   `-` -`   `-----`     `-`'    `-----`   /_//       `---`   
                                                            `-`