How to make the camera move along a drawn path in c4d?

1. Draw a spline path in the elevation as shown below.

2. Return to the front view and add a camera (as shown below).

3. Right-click the camera and add the CINEMA 4D label to align its curve (as shown).

4. Select the curve path, find the curve path in the label, and draw the spline path for it. (as shown in the figure below)

5. Then adjust the position in the label. If you want to rotate in different directions, you have to do your own K camera animation.