The checkbox has been just added few days ago. Before it wasn't optional. Just written the doc http://doc.jsfiddle.net/basic/introduction.html#normalize-css htt

The checkbox has been just added few days ago. Before it wasn't optional. Just written the doc http://doc.jsfiddle.net/basic/introduction.html#normalize-css http://doc.jsfiddle.net/basic/introduction.html#normalize-cs... Docs are opensourced (https://github.com/jsfiddle/jsfiddle-docs-alpha https://github.com/jsfiddle/jsfiddle-docs-alpha) Please file issues and requests https://github.com/jsfiddle/jsfiddle-docs-alpha/issues https://github.com/jsfiddle/jsfiddle-docs-alpha/issues