![background image](/i/blackberry/157170/blackberry-9788/h/blackberry-9788-007.png)
Delete a language...............................................................................................................................................................................................
201
Troubleshooting: Language................................................................................................................................................................................
201
202
Set options for backlighting................................................................................................................................................................................
202
202
Change the display font......................................................................................................................................................................................
202
203
Add a message that appears when your device is locked..................................................................................................................................
204
Use grayscale or reverse contrast for the screen display...................................................................................................................................
204
204
Themes...............................................................................................................................................................................................................
204
Troubleshooting: Display....................................................................................................................................................................................
205
GPS technology...................................................................................................................................................................................................
206
206
206
Set the GPS receiver that you use to track your movement..............................................................................................................................
206
207
207
Turn off location aiding......................................................................................................................................................................................
207
Troubleshooting: GPS technology......................................................................................................................................................................
208
Maps...................................................................................................................................................................................................................
209
Map basics..........................................................................................................................................................................................................
209
212
212
Troubleshooting: Maps......................................................................................................................................................................................
213
214
214
Keep an application running in the background and switch to another application.........................................................................................
214
214
About adding applications..................................................................................................................................................................................
215
216
216
Require your device password before adding an application............................................................................................................................
216
217
217
217
217