I can provide you with a list of services that you may consider offering for presentation designing:

1. Customized PowerPoint, Google Slides, or Prezi presentations.
2. Redesigning old presentations with a professional touch.
3. Adding transitions and animations to presentations.
4. Creating visually appealing graphics and images for presentations.
5. Developing effective presentation content and messaging.
6. Providing feedback and revisions to improve presentations.
7. Converting existing documents into presentation format.
8. Creating templates and guidelines for future presentations.
9. Collaborating with clients to ensure the final presentation meets their goals and objectives.
10. Offering training and support on how to deliver effective presentations.