Audiovox VM9413 Reference Manual page 21

8. Signal strength indicator.
9. Current preset channels/on-screen preset buttons.
10. CH -: Select the previous channel.
11. CH +: Select the next channel.
12. CAT +: Select next channel in current category only.
13. CAT -: Select previous channel in current category only.
14. Touch to enter channel directly using keypad on screen.
15. CG: Access Channel/Category Guide mode. Use the scroll bar and arrows on the
touch screen to view the next/previous page of channels/categories.
16. BAND: Change between SAT1, SAT2 and SAT3 bands.
17. Touch to view the SETUP menu.
18. Touch this area to view the SOURCE MENU and select a new playback source.
19. MEM: View screen used to enter current channel into preset memory.
20. DIAG: This feature is reserved for use by service professionals for
troubleshooting.