Can you please tell us which MAGIX product, and version, you are using?

Assuming you are asking about MMM...

First, you need to know MMM can only affect arrangement objects.  It cannot do effects in real time while recording.

You can Pan any individual track statically using the Mixer.

You can animate the panning of any individual object or track using the Dynamic Effects Editor.  To access it in MM-15, go to...

(Object Menu) > Automation > Object Automation [OR] Track Automation > Panorama

Much of this is explained in the user's manual.