Sloan's Book Press, Peter, Julia & Kitty
The way all cartoonists learn how to keep faces looking in proportion is by measuring the area into sections. This is done by dividing the area into several different portions. This diagram shows three strokes made. The first stroke goes from top to bottom, this divides the page straight down the middle. A stroke is made at the very top of this going from left to right. This is indicated in the diagram as '1st stroke'. The other stroke is made at the very bottom of this area going from left to right. This is labeled as the 2nd stroke. The 1st and 2nd stroke decide the placement of the very top and bottom of the head. These strokes will remain at all phases of the drawing to keep the head in proportion. The next diagram divides the chart into a half, for the placement of the eyes.
The midpoint is extremely important because it decides the placement of the eyes. The eyes are drawn at the very middle most point of the page. Now make that dividing stroke to decide the midpoint.
Continuing, we already divided the page in two with the center stroke, made the first and second stroke at the very top and bottom going from left to right now need to make a mid point.