Twitter CEO Dick Costolo on Tuesday showed the site's redesign on the and talked about putting a new focus on user photos and profiles.

Users will be able to check out the new look on .com or Twitter's apps for the platform and , as well as the company's newly overhauled app for the .

"Users want to bring more of their personality to their profile pages," Costolo said.

Twitter's includes giving users the ability to upload what the company calls a header photo. The photo, which gets a lot of screen real estate at the top of the user's Twitter page, sits above the tweets.

The site also added photo streams to its mobile apps, enabling users to scroll through thumbnails of others' photos or click on them to see a full-size image.