To quickly replace a given font in all of your title and bullet text with another font style, select Replace Fonts under Format on the main menu (see Figure 3.13). This gives you the Replace Fonts dialog box. In the top, you select the font you want to replace. In the bottom, you choose the font that should replace it. After you click OK, all the title and bullet text of the selected font is changed to the new font.
Figure 3.13 When you select either a title or bullet placeholder and use the Replace Fonts command, you can quickly revise the look of your entire presentation.
Needless to say, be careful with this technique, especially in a presentation with many slides, and keep your Undo icon in mind.