Colorizer is a finger-painting picture-enhancing tool that plugs into your Windows Phone 7 Pictures extras menu. Choose a picture, bring up the extras menu from the app bar, and choose Colorizer. Then you can start painting color back into a black & white copy of the picture. Enhance portraits, nature scenes, or group shots with some artistic touches. Bring focus and color into the right spots: just where you want it; explore neat visual effects and then share your creatively enhanced memories right from your phone.