3-4 Garmin GTX 335/345 Pilot’s Guide 190-01499-00 Rev. A3 – DISPLAY FUNCTIONS/SETTINGS3.4 System (SYS)BACKLIGHT – This page displays the current backlight level andbacklight level offset. The backlight level offset is via the CRSR and8 and 9keys.CONTRAST – This page displays the current contrast level andcontrast level offset. The contrast level offset is via the CRSR and8 and 9keys.NOTEMessages are not high priority. Their purpose is to provide additionalinformation on abnormal system behavior. They do not requireimmediate pilot action. Any transponder failure will immediately displayan alert with no pilot action necessary to view the alert. Fortroubleshooting failure messages, refer to section 7.MESSAGES – This page displays the number of active system messages.Viewing active system messages is via the CRSR key selection.BLUETOOTH (GTX 345) – This page displays the status of the GTX 345Bluetooth function. The Bluetooth function is automatically placedinto pairing mode when this page is displayed. Pairing must beinitiated by the PED and then confirmed on the GTX 345. The last 13paired PEDs are saved. At system power on, the GTX 345automatically connects to any available and previously saved pairedPEDs. PEDs that are currently connected and paired areviewed/deleted via the CRSR and 8 and 9keys. For instructionson Bluetooth pairing refer to section 3.4.1. For information onConnext Bluetooth features, refer to section 6.PressFUNCkeyPressFUNCkeyPressFUN CkeyPressFU NCkey