@xara I believe that Gary P originally mentioned this is in a prior post that I can't locate at the moment.

Drag and Drop from another file is not working; and if it is intermittently. Wanted to add a photo to a slide show to an existing and it didn't accept. Closed program and re-opened with the same problem. Dragging a photo from a file to a blank page is also not working. Import is the other option. But it remains difficult to import into a slide show widget.

-Bill