Adding slide numbers will also help you to guide people through your presentation. Many good PowerPoint presentations contain links to other slides or external sources, such as websites.

First is a two part set of videos that walks you through organizing a presentation. Designing PowerPoint Slides for a Scientific Presentation walks you through the key principles in designing powerful ...

Good luck with that ... Because you've seen hundreds of PowerPoint presentations since your sixth-grade science-fair days, you instinctively know this one's going to take the full hour.