You can change the type of font you are using for text on specific slides, or you can apply different fonts throughout a whole presentation.
Do one of the following:
Change the font on a slide
How?
To change the font for a single paragraph or a phrase, drag to select the text.
Tip
You can also use the Font dialog box, on the Format menu, to change the font for text. Additionally, in this dialog box, you can apply other types of formatting, such as type size, bold or italic type, and text color.
Use the slide master to change the font throughout the presentation
If you're using one slide master, you can change a font style on the master and the change is reflected throughout the presentation. If you are using multiple slide masters (such as when you have applied more than one design template to your presentation), you must change the font style on each master.
In master view, thumbnails of each slide master (in pairs that include a title master for each) appear to the left of the Slides tab.
(Remember, on the master, you are only changing the font, not the text.)