LiDAR View provides a real-time image from the LiDAR and the camera, you can choose an image from the LiDAR, the camera, or both of them.
If you choose an image from the LiDAR (number 3 or 4), it can be used to see in a dark environment.
Number 2 or 4 is the image from the camera and LiDAR, and highlights the contour of the environment.
You can also turn on the flashlight by clicking the torch icon.