When creating bar charts and graphs choose reds, oranges, and yellows rather than blues and greens. Also consider using dots or cross-hatches to increase clarity, and select colors from different ends of the color spectrum. An image is more readable when the edges of the image remain crisp. Metallic ink, shiny paper, enlargements, and brilliant colors enhance publications, slides, and filmstrips. But, too much of a good thing makes blurry and tiring images for older eyes.
Identification is the ability to recognize specific images.
In printing, the size and detail of the image depends on the choice of font and spacing. Choose a font that's large enough to be seen clearly, and simple enough that the smallest letters are crisp and clear. Decorative type is difficult to read. The white space within and surrounding a letter or image is equally important. More internal white space increases legibility.