You may have noticed that there’s no intuitive way to add your own text placeholder to a master slide in Keynote ’08. In other words, if you want to make a set of slides that has more than just a title and body you can either (1) add a text box on every page or (2) try to add a text placeholder to Keynote. The second option isn’t so intuitive, but here’s how to do it:
- Select View » Show Master Slides.
- Select the master slide you want to edit. Make a text box in a master slide and keep it selected.
- In the Inspector, go to the Slide Inspector (second from left), and select the Appearance tab.
- Check the checkbox next to Define as Text Placeholder, and create a tag.