If you use Apple, this app has built-in editing tools.
Want to take your organization even further? Learn Iconclass, "a comprehensive classification system for the content of images." Iconclass has 10 categories, or concepts, and an image can be tagged with as many concepts as relevant.
Want to move beyond PowerPoint and Google Slides? Try these tools! Find presentation and tech support at the Weigle Information Commons in Van Pelt.