I believe that, by definition, graphic design must communicate through a visual medium. Some of the decisions that a graphic designer needs to make include: size, proportion, visual hierarchy, spacial arrangement, color, contrast, value, pattern, repetition, typography, composition and balance. Graphic designers work on the screen, in print, and multi-dimensionally, with light and sound and intangibles. An inextricable part of the culture, graphic designers continually make incursions into territory occupied by other arts.