Lowrance HDS Live Operator's Manual page 50

Your vessel heading is based on information from the active
heading sensor and the COG is based on information from the
active GPS sensor.
SonarChart Live tide correction
When selected, the tide correction feature uses information from
nearby tide stations (if available) to adjust the depth values used by
SonarChart Live as the sonar is recorded.
Synchronize 2D/3D chart
Links the position shown on one chart with the position shown on
the other chart when a 2D and a 3D chart are shown side by side.
Pop-up information
Determines whether basic information for panel items is displayed
when you select the item.
Grid lines
Turns on/off viewing of longitude and latitude grid lines on the
panel.
Waypoints
Turns on/off displaying waypoints on charts.
Routes
Turns on/off displaying routes on charts.
Trails
Turns on/off displaying trails on charts.
Waypoints, Routes, Trails
Opens the Waypoints, Routes, and Trails dialog where these items
can be created, edited, deleted, and searched.
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Charts | HDS Live Operator Manual