There is a rule in design based on the principle that the closer and larger a target is, the faster it is to click on it. The concept seems self evident, but it is surprising how much that concept affects on a web page. Users are actually less likely to respond to a call-to-action if it takes more effort than they want to expend on navigating to the button.

The concept is called Fitt’s Law, and it can have a big impact on how users respond to your website, but don’t start redesigning your page around it quite yet. Anastasios Karafillis pinpoints some instances where Fitt’s Law is not the best design principle to follow. She explores every aspect of the law, and how it can help or hurt you in specific circumstances.