I have about a dozen slides interspersed throughout my presentation that I change every week to a new background. I don't want to duplicate slides and then move them because they all have different titles. Currently the quickest way I have found is select the slide, switch to the open media window (in which I previously selected my new background), and click "Apply to current item". Then repeat for every slide. It would be nice to have a way to select and update all the slides at once in one swell foop.