Apple Keynote '08 - Manual (Page 192)

192 Chapter 10 Designing Your Own Master Slides and Themes
To define a media placeholder:
1 Select a master slide.
2 Open the Master Slide Inspector, and then click Appearance.
3 Select “Define as Media Placeholder.”
4 (Optional) Type a description in the Tag field.
5 Resize and rearrange the placeholder as desired.
6 (Optional) Add a placeholder image.
Defining Object Placeholders
You can create a placeholder on a master slide to hold tables and charts. When you add
one of these items to a slide based on that master, the object automatically goes into
the placeholder at the specified position and size.
To define an object placeholder:
1 In the Master Slide navigator, select a slide (to open the Master Slide navigator, click
View in the toolbar and choose Show Master Slides).
2 Open the Master Slide Inspector and then click Appearance.
3 Select Object Placeholder.
4 Position and size the placeholder.
Creating Background Elements on Master Slides
You can make an element (such as a company logo or other graphic, text, or color)
appear on every slide that’s based on a particular master slide.
Using this technique is one way to create groups of related slides within a presentation.
You could, for example, incorporate a subtle difference in the background of each
group of slides. To do so, you create a set of master slides with each of the different
backgrounds.
To modify a master slide background:
1 Select a master slide to work with.
2 Select unwanted elements and then press the Delete key.
3 If you want an object (shape, image, sound or movie file, table, or chart) to be a
background element, add it to the master slide and then size and position it on the
slide.
After you place an object, you can choose Arrange > Lock to prevent it from being
accidentally moved as you work.