title: Make just one slide different size in Powerpoint
body: <p>Making a powerpoint that's supposed to show a before and after of a website.  Since it's currently a long website I'd rather make a single long slide to put it on (20" instead of 7.5").  But all the other slides in the presentation should be normal-sized.</p>
  
  <p>I found Slide Size (Design ribbon, Customize section) but that resizes ALL slides.</p>