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♦ To Use a Built-in Theme in PowerPoint. PowerPoint 2007 has 19 built-in, ready-to-use themes. Just place your cursor over the theme to get a quick look on how your presentation will appear. Do the following steps:
Open a blank presentation.
Select the Design tab, and choose the desired theme. Your title slide will appear.
Add your title and subtitle.
Add any graphics by selecting the Insert tab, Illustrations group.

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To Download a Free PowerPoint Template. There are dozens of websites that advertise their wares in both free and not-so-free PowerPoint templates. We have listed three free sites below. (See the related Bright Hub Articles listing at the end of this article for more sources.)
Go to any one of the following websites:
MS Office Online - Templates
TemplatesWise.com
INDEZINE
Download the free template, which will open in PowerPoint.

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To Add a New Slide to the Template. Unless you specify otherwise, your subsequent slides will following the same theme as your title slide. Do the following to add a new slide to your presentation:
Select the Home tab.
In the Sides Group, select New Slide. A blank slide will appear.
Complete your bullet points.
Add any graphics by selecting the Insert tab, Illustrations group.