PowerPoint provides several different ways to change the default font of a presentation. You can set a default font for new text boxes, find and replace specific fonts throughout the presentation, or change the default font for heading and body text and save it for future use. Here’s how.
Changing the Default Font in Text Boxes
PowerPoint provides a large library of different themes, and each theme has its own set of default fonts. If you like the design of the theme, but you aren’t particularly happy with the font, then you can change it. The easiest way to make this happen is in PowerPoint’s Slide Master.
As Microsoft points out, Master slides control the overall appearance of the presentation. This includes colors, background, effects, and, most importantly, fonts. To access the Slide Master, go ahead and open PowerPoint, head over to the “View” tab, and then click the “Slide Master” button.
You’ll notice a copy of each available slide template appear in the left-hand pane. Select the first slide and then click the “Fonts” button on the “Slide Master” tab.
A drop-down menu will appear. Here, you’ll see an extensive list of predefined heading and body font pairs. Selecting any of these options will change the text for the entire presentation. Alternatively, you can choose the “Customize Fonts” option at the bottom of the menu to choose your own fonts.
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Source: How-To Geek
