I'm new to Powerpoint 2007, and I'm working on a PPTX file that was handed to me with a number of established themes.

At the bottom right hand corner is a slide number which I cannot select and delete. Page Setup will only allow a number. I cannot set it to blank. There is an option for turning off the title page number, but that only applies to a footer added now. It won't change the existing page number. It seems as if the number is a part of the theme background.

I'm not sure if I can get ahold of whomever created the original document. Is there a way to eport the theme or edit the theme to get rid of it?