In Graphic design, on a page, the arrangement between elements and contrast is what creates an order of importance as a persons eyes are normally drawn to the boldest, brightest, and largest elements. An information hierarchy is created by using contrast to draw attention.

When you need to separate elements on a page that have a different function or are unrelated, use very obvious contrast to achieve this. An example of this is using one type of font and size for the heading and another font type and size for the information text.

To make a CAL package easy to maneuver around, feel comfortable and look professional, there should be a form of repetition that covers the style of graphics, background, color, typeface, repeated elements placement and overall style.