I am using the Lightbox to view all my slides and move them to the proper order. When I drag and drop them, it copies the slides -- it does not just move them. Is there a setting or preference to change this? Or am I missing something? It would make ordering slides much easier.
Dragging slides in the Lightbox works a bit different than dragging slides in the Slides / Timeline views. In the Lightbox it's possible to drag the slide OR the content within the slide to a new position in the show. The 'slide thumbnail' in the Lightbox is also different, showing the individual slide content rather than a thumbnail of what the slide will look like at its midpoint.
Click on the area below the 'slide thumbnail', near the slide number, to drag the slide to a new position. The default behavior is a move. Hold the CTRL key when dropping the slide to perform a copy instead.
Click on an image in the 'slide thumbnail' area to drag that image layer to a new position in the show. The default behavior is a copy. Hold the CTRL key when dropping the layer to perform a move instead.