How do I use multiple templates in a presentation?

You can use multiple templates in a single presentation if you use PowerPoint 2002/XP/2003/2007/2010 or higher. Presentations with multiple templates applied show up and play with multiple templates in PowerPoint 2000 (and PowerPoint 97 to some extent) as well, although that version does not allow you to use multiple templates natively.

Open your existing presentation and choose the Format | Slide Design option. This action will activate the Slide Design task pane and show thumbnails of your existing templates. Again, you might want to create a separate Indezine folder within your PowerPoint templates folder to see thumbnails of Indezine templates. Instructions are provided here.

Change your presentation view to Slide Sorter view and select individual slides for which you wish to apply any design template. Use the Ctrl and/or Shift buttons to select multiple slides.

With your slides selected, click the thumbnail of the template in the Slide Design task pane to apply the design to the chosen slides. If all thumbnails are not visible, you can click the Browse... button on the bottom of the pane and navigate using the familiar Apply Design Template dialog box and choose your Indezine template (*.pot) file.

Note: If you have disabled your Multiple Masters options using Tools | Options | Edit | Disable New Features (PowerPoint 2002/XP/2003), you might not be able to follow the steps detailed above.