Some sketchers start by drawing a border and then filling in the frame. I prefer not to restrict my images to fit within a predetermined frame; my only size constraint is the page or two-page spread on which I’m drawing. And even then, I try to leave myself room for the drawing to develop and grow if necessary. For this reason, I tend to draw vignettes, images that fade into the background without a definite border.
You can see here how I typically start a drawing by roughly outlining the basic forms and establishing a skeletal structure upon which I can elaborate. Then, depending on how much time I have, I select what I want to focus on and develop those details, textures, and values. This approach allows me to leave parts of a drawing unfinished if pressed for time, especially when drawing on location.
Here is another example of how I’ve left portions of a drawing unfinished, allowing the viewer to fill in or sense the missing parts without those parts being actually drawn. Unfinished drawings, in fact, can often engage viewers by exercising their visual imagination.