Content changes between two revisions of a PowerPoint file, slide by slide.
Checks slide text, tables, SmartArt, chart data, images, video and audio, speaker notes, and hidden slides. Fonts, colors, sizes, positions, layouts and animations are ignored. Inserted, deleted and reordered slides are matched by their content. PowerPoint renames inserted pictures to image1.png and so on, so images are compared by their actual pixels; the original filename is shown when the file still carries it in the alt text or as a linked path.