Chapter IV: THAT you would accustom yourself in Works that have many Lines, to

make the Perspective-Plans and Uprights for each Part distinct, so as to prevent all Danger of Confusion. Thus you may have one Plan and Upright for the Basement of a Building; and when that is drawn on your finish’d Piece, remove them, and place those of the Body of the House; and when that’s complete, do so by the _Attick_, &c. always observing so to place the Plan below, and the Upright on one side of your neat Draught, that your Drawing-Square may command each of them; which will mightily shorten your Work.