The default framing box for a storyboard image is a horizontal rectangle. This rectangular composition box has a specific ratio between the horizontal and vertical length of the framing box called the aspect ratio. The aspect ratio determines how wide the image is by denominating the horizontal width versus the height. For example, the aspect ratio of 2.35:1 means that the horizontal width is 2.35 times the height. Using different aspect ratios will affect the composition of the storyboards. For this reason, one of the most important things to determine before beginning any project is what the aspect ratio will be. Each project will call for a different aspect ratio, so here are some of the most common formats.