SAN FRANCISCO: Twitter on Thursday announced it has finished rolling out overhauled pages crafted to boost the appeal of the message-sharing service to users around the world. "At the very core there are fewer places you have to click and less you have to learn," Twitter co-founder Jack Dorsey said as he and other executives unveiled the changes at the startup's San Francisco headquarters in December. "We've done a lot of user testing and it has proven to be much simpler," Dorsey added. Overhauled navigation features take advantage of the fact that Twitter symbols such as @ and # are making their way into common culture, showing up anywhere from text messages to advertising billboards and television. Twitter designed Connect navigation tools that essentially turn those symbols into new age URLs, or web addresses, to let people find all posts or other information being fired off about topics. Twitter also expanded profile pages, letting users tell more about themselves or, in the case of companies, their brands. The Twitter overhaul completed on Thursday includes new Timeline that brings together all Twitter chatter or content related to a...