A question mark is commonly used in web design as a symbol implying that extra information is close at hand. Often associated with Frequently Asked Questions areas in websites, the question mark clearly informs the viewer that an answer is nearby. Why not incorporate the ‘?’ symbol into a button design and use it to highlight areas on your site that provide answers to questions.

Sometimes a simple symbol - turned into a web graphic - can be more effective than using an image. Webdings and other fonts that use icon style images also look great!