Transparency when dragging picture over another gone?

In PPT 2007-2010 when one dragged a picture on top of another it became transparent, allowing to position it accurately.

In PPT 2013 this seems no longer the case. Luckily you can use the ctrl-key to get a transparent picture. So hold the ctrl-key and drag your picture over the other one, just be sure to release the ctrl-key first once the picture is correctly positioned otherwise you will have a duplicate.

PPT 2013 - dragging

PPT 2013 - ctrl+drag