On the LP360 toolbar, click the arrow next to the Display by Legend button.
Select the Display by Elevation Difference button.
The Display by Elevation Difference legend type displays LAS data color-coded by the elevation difference between two surfaces at X and Y locations.
The symbology is set on the Delta Z tab on the LIDAR Properties dialog box under the Symbology tab.
On the LP360 toolbar, click the arrow next to the Display by Legend button.
Select the Display by Elevation Difference button.