Read an Excerpt
As you work, it's a good idea, from time to time, to hold a mirror to your sketch. The image in the mirror frequently shows distortion you might not recognize otherwise.
In the book you will notice that the new step additions (in color) are printed darker so they can be clearly identified. But be sure to keep all of your construction steps very lighty. Here's where the kneaded eraser can be useful. You can lighten a pencil stroke that is too dark by pressing on it with the eraser.