Garmin GTX 330 - Manual (Page 5)

Keys for Other GTX 330 Functions
IDENT Pressing the IDENT key activates the Special Position
Identification (SPI) Pulse for 18 seconds, identifying your transponder
return from others on the air traffic controller’s screen. The word IDENT
will appear in the upper left corner of the display during this time.
VFR
Sets the transponder code to the pre-programmed VFR code selected
during installation configuration (this is set to 1200 at the factory). Pressing
the VFR key again restores the previous identification code. If the VFR Key
is pressed when disabled (dependent upon installation configuration) a VFR
Key Disabled message appears to indicate that no operation took place.
FUNC
Changes the page shown on the right side of the display. Display
data includes Pressure Altitude, Flight Time, Altitude Monitor, Count Up,
and Count Down timers. Also displays Outside Air Temperature, Density
Altitude, Contrast, Display, and ADS-B Operation (dependent upon
installation configuration).
START/STOP
Starts and stops the Altitude Monitor, Count Up, Count
Down, and Flight timers.
CRSR Initiates starting time entry for the Count Down timer and cancels
transponder code entry.
CLR Resets the Count Up, Count Down, and Flight timers. Cancels the
previous keypress during code selection and Count Down entry. Returns
cursor to the fourth code digit within five seconds after entry.
8
Reduces Contrast and Display Brightness when the respective fields
are displayed (dependent upon installation configuration) and enters the
number eight into the Count Down timer.
9
Increases Contrast and Display Brightness when the respective fields
are displayed (dependent upon installation configuration) and enters the
number nine into the Count Down timer.