Humminbird ONIX Operating Manual page 180

Create a Waypoint with Screen Snapshot
If you turn on Create Waypoint in the Images tool, each time a screen
snapshot is taken, the waypoint position will be saved.
1. Press the HOME key.
2. Select the Images tool.
3. Select Settings.
4. Select Create Waypoint. Tap the on/off button, or press the
ENTER key, to turn it on.
When a screen snapshot is taken with Create Waypoint turned
on, the screen snapshot will display a waypoint icon in the
Images tool preview.
Images Tool 180
screen snapshot saved with
Create Waypoint turned on