Blackberry 8520 User Guide - Page 177

User Guide Display and keyboard Download a theme Depending on your wireless service provider, this feature might not be supported. 1. On the Home screen or in a folder, click the Options icon. 2. Click Theme. 3. Press the Menu key. 4. Click Download Themes. Accessibility options Use reverse contrast for the screen display 1. On the Home screen or in a folder, click the Options icon. 2. Click Advanced Options. 3. Click Accessibility. 4. Change the Color Contrast field to Reverse Contrast. 5. Press the Menu key. 6. Click Save. Display troubleshooting My device screen turns off When you do not use your BlackBerry® device for a period of time, the screen turns off to conserve battery power. To turn on the screen, click the trackpad or press a key. My display changed Depending on your theme, display options, such as your font and Home screen background, might change when you switch themes. Related topics Change the display font, 171 Use a picture as the Home screen background, 97 No application opens when I press a Convenience key Try performing the following actions: • Verify that you have not deleted the application that you assigned to the key. • Assign a different application to the key. 175