The good news is that you can save the fonts you use in your presentation with your presentation. Don't leave such an important visual tool up to chance. At worst, the system will substitute a font that makes a mess. At best, the system will substitute a font that works well enough. But the fonts that are available on the system you use to create a PowerPoint presentation might not be available on the system you actually use to share the presentation. Fonts are a luxury that we often take for granted.