Custom theme with particular (text) content on every (master) slide
I don't want to create a theme for every single presentation I prepare. I want to open my custom theme and start adding contents to my slides. However, there is some content that should show up on every single slide. E.g., my name and a reference to the particular occasion should be present on every slide.
Here is how I think this should work: I have to create a text box with that content on the master slide(s). Obviously, it would be rather unnerving to edit every single master slide. Naturally, I just want to define some content that will show up on all my master slides.
Unfortunately, I could not find out how to achieve this. Any help is welcome.
Keynote '09 5.0-OTHER, Mac OS X (10.6.8)