Explore Theme Builder
The BlackBerry Theme Builder lets you create themes to personalize the screens on the BlackBerry device. For example, you can change the background image, change the color of the font, change the applications that appear on the screens, set an application to open a webpage, add a ring tone, and create screen transitions. You can use sample images that are included in Theme Builder, or you can create and use your own images in your themes.
With Theme Builder, you can create a theme for your own personal use, or you can make themes available online (for example, on the BlackBerry App World storefront) so that other BlackBerry device users can download them.
Before distributing a theme, you can test it on the BlackBerry Smartphone Simulator or you can install the themes directly on a device to test.