Table of Contents Message to the Drafter page 7. Message to the Construction Professional page 8. Picture N 1 The drawing alignment page 9. Hand-made sketch, Introduction page 10. Useful tips over the visual angle page 11. Picture N 2 Sketch of a work page 12. Picture N 3 This visual angle influence page 13. Picture N 4 A building placed on a street corner page 14. Useful tips over the vanishing points page 15. Picture N 5 Perspective of a simple piece of furniture. p. 16, drawing A. Picture N 6 Hand made interior perspective p. 17, drawing B. Explanation over Pictures N 5 and N 6 page 18. How to make a sketch page 19. Pictures N 7-1 and N 7-2 Modification process in a hand made sketch proyect page 20. Picture N 7-3 Modification process which is being evaluated at the same time that the project is in progress page 21. Useful tips over the sketch proyect page 22. Picture N 8 Project process page 23. Picture N 9 Swift sketch od an enlargement page 24. Picture N 10 Two swift sketchs page