The grid system
Use of the grid is an artist's method of enlarging a small image and transferring it exactly onto another surface. The grid method is an inexpensive, low-tech way to reproduce and/or enlarge an image that you want to paint or draw. The grid method can be a fairly time-intensive process, depending on how large and detailed your painting will be. While the process is not as quick as using a projector or transfer paper, it does have the added benefit of helping to improve your drawing and observational skills.
In a nutshell, the grid method involves drawing a grid over your reference photo, and then drawing a grid of equal ratio on your work surface (paper, canvas, wood panel, etc). Then you draw the image on your canvas, focusing on one square at a time, until the entire image has been transferred. Once you're finished, you simply erase or paint over the grid lines, and start working on your painting, which will be now be in perfect proportion!
Be able to enlarge a drawing using the grid system
