This isn't actually a question. I'm just providing the best answer that I've found and that I haven't seen anywhere else on the forum. I'm taking video of people giving speeches that incorporate slide presentations, then trying to splice the slides into the video, with transition effects, and still stay in sync with the audio track. The best solution that I have found in MEP17 is:

First, export the slides from the presentation as graphic files (jpg or tif, etc). In Magix, from the tool bar at the top of the timeline viewer, select the "Insert Object" tool and choose "Overwrite." Drag the desired object from the media pool into the timeline. This will cause the inserted graphic object to overwrite the material on the given track without moving any objects on any of the tracks. Before inserting, select "File / Settings / Program / Video-Audio." Under "Standard Picture Length," set the length of time that you want the inserted object to be. Once the object is inserted, to create a fade between the object and the preceding and following video, grab the leading edge of the object and drag it one second (or desired amount for transition) forward to overlap the preceding video, then drag the trailing end of the object down the timeline to overlap the video on the trailing end. Click on the object to highlight it, then click on the “AB” icon within that segment of video to bring up the list of fades. Select the desired fade and it will be applied.