The 1968 Olympics logo is a great example of line. It is used to create repetition and texture, and keeps our eye moving throughout the logo.
This set of photographs is an example of plane. In this case, the billboards are used as the plane that the advertisement is created on.
This magazine spread is an example of texture. The brush strokes behind the picture of a man and title create an interesting texture.
This website design is an example of scale. The origami birds in the foreground are bigger than the ones in the background, which make them look closer to the viewer.