How to make the camera move according to the specified path in 3dmax?

in 3ds max, the method of moving the camera according to the specified path is as follows:

1? Create spline as camera motion path. Create a target camera and select all cameras (including target points), and click Animation-Constraint-Path Constraint in turn.

2 ? Click on the spline. At this time, the whole camera is constrained at the starting point of the spline and will move along the spline path. ? Click on the target point to move the required distance in the direction of movement.

3 ? Select a camera and move the slider to see that the camera is always on the path and moving in the direction of the path. Ensure that the camera always moves in the direction of spline, not in one direction.