Clickability

If a more obvious clue that clearly communicates clickability, such as an underline, fails to appear on a web page, users might start desperately running the mouse around the page […]

The "clickability" of the foams, a measurement of a foam's usefulness in die-cutting processes, was determined by placing a piece of foam 1 in. thick under a square die, 2 1/2 by 2 1/2 in.