making a loose, scribbly sketch of what the subject looks like, you are also trying to tell more about what your subject is and what it is doing. You are not drawing only what you see, but what you feel is the essential character or action of your subject. It is often hard to describe gesture drawing without resorting to almost mystical terms, because gesture drawing records your impressions, thoughts and feelings about your subject. Gesture is a spontaneous record of what you think best captures the inner vitality of your subject. Draw what your subject is like or what it is doing.
If you consciously try to make whatever you draw fit on the paper, you’ll get in the habit of seeing how the sizes of the various parts of your subject are related. You’ll also develop an instinctive sense of proper proportion and composition. You will develop the habit of thinking about how whatever you are drawing fits whatever size and shape paper you use.