In these days we want to have our PowerPoint presentations “rich and beautiful”. Cool fonts, soft backgrounds and a serie of animations or transitions that pisses-off everyone except presentation’s author are just not enough. We want to have many beautiful images do depict our presentations. Maybe we even want every slide to have different fully photographic background etc.
This is especially true given the fact that there are many services like pixabay.com which offers you hundreds of thousands of beautiful photos completely royalty-free.
However, there’s a well known problem with PowerPoint. If you add any filter or modification to the image placed on some slide, it will be internally saved as PNG format irrespective of the actual format that source image has!
For example, I had a tiny, 9-slides presentation, where each slide had a different full-page photo as a background. Because images were too bright (overlying slide’s text was hard to read), I applied a -40% brightness filter to each image. All my nine source images were saved as JPEGs and took only 1.50 MB on disk. But PowerPoint presentation using them had… 18,1 MB! Over ten times more. And I had to implement a serie of steps to prevent that.
Read More “Reduce PowerPoint presentation’s file size in easy steps”