Blackberry 8830 WORLD EDITION User Guide - Page 153

2. Perform one of the following actions: • To zoom in, roll the trackball up. • To zoom out, roll the trackball down. 3. Click the trackball. View status information at the top of a map You can view the battery power level, wireless coverage level indicators, the time, and satellite and Bluetooth® connection information at the top of maps. 1. On a map, press the Menu key. 2. Click Options. 3. Change the Hide Title Bar field to No. 4. Press the Menu key. 5. Click Save. To hide the status information again, change the Hide Title Bar field to Yes. Clear the map cache 1. On a map, press the Menu key. 2. Click Options. 3. Press the Menu key. 4. Click Clear Cache. Tracking Tracking prerequisites • If your BlackBerry® device does not have an internal GPS receiver or your wireless service provider does not support location-based services, verify that you have paired your BlackBerry device with a Bluetooth® enabled GPS receiver. For more information, contact your wireless service provider. • Verify that you have set a GPS receiver to use when you track your movement. Set the GPS receiver that you use to track your movement 1. On a map, press the Menu key. 2. Click Options. 3. Change the GPS Source field. 4. Press the Menu key. 5. Click Save. 151