Humminbird Onix Opeartion Manual page 139

Display the Data Overlay
Digital readout data can be displayed as an overlay, and it can be displayed in the data bar. To turn on the data bar, see Views:
Display a Data Bar. For more information about data overlays, see Views.
1. From the Overlays menu, select Data Overlay.
2. Select Show. Tap the on/off button, or press the ENTER key, to turn it on.
3. Tap the menu name, or use the Joystick, to select an item and add a check mark.
speed data
overlay
COG data
overlay
Radar View with Overlays Displayed
139
heading line
compass
range ring
vessel icon
Radar Options