Line essentially indicates direction and so leads the eye. It will also encourage the eye to continue beyond its length. lt may be either implied through the juxtaposition of two elements, as with points, or actual, as in a drawn line, a line of text, a typographic rule or set of images or other elements. The strategic placement of several lines can create an illusion of depth (linear perspective) (diagrams 6, 7). Lines may also be used to suggest form, delineate, enclose or divide, emphasize, and act as a visual marker (diagrams 8, 9, 10, 11).
Area is a defined surface or plane, and it acts as a visual container, drawing attention to its content or edges. Graphic designers are concerned with area as a means of defining format and proportion and as a way of pacing