How does mini3pro move the lens

Specific steps: 1. Open and create a spline object. 2. Then create a free camera object. 3. Select and move the tool to create a linear motion.

By using the "Select and Move" tool, select a camera, a path constraint, add a path constraint object to the camera, and select the created line in the window, the camera lens can move along the line. A moving camera can only move on a spline.