I need to rotate some pictures in my iPhoto or Aperture library. Why can I do that with PhotoPresenter?
PhotoPresenter aims at being a simple and easy-to-use slideshow viewer that complements iPhoto and Aperture. For safety reasons, PhotoPresenter will never modify the contents of your iPhoto or Aperture library. If you want to rotate an image in your library, simply use iPhoto or Aperture. When all your photos are oriented correctly, you might then want to use PhotoPresenter for a great slideshow experience that complements the slideshow options of iPhoto and Aperture.