How to update a Keynote ’09 presentation to widescreen in Keynote ’13
I have a number of presentations which were created in Keynote ’09 on my MacBook Pro. Now I've upgraded to Keynote 2013 I'd like to change the backgrounds to a widescreen template. I don't want to start again and do a load of copying and pasting and I certainly don't want to create all the transitions and builds from scratch. Is it possible just to change the background to one that measures 16:9 without disturbing the contents?
MacBook Pro, Mac OS X (10.7.5), 17", 3GB 667Mhz DDR2 SDRAM