1. From the Home Screen, press the Center Nav key.
   
2. To delete the History, press the Left Nav key.
   
3. Scroll to History, then press the Center Nav key.
   
4. Press the Left Nav key.
   
5. Press the Left Nav key.
   
6. To adjust the text size, press the Left Nav key.
   
7. Scroll to Settings then press the Center Nav key.
   
8. Scroll to Font size, then press the Center Nav key.
   
9. Scroll to the desired option, then press the Center Nav key.
   
10. Press the Left Nav key.