You can make them with Google Slides, Microsoft PowerPoint, or another program. Slideshows are a reality of the working world. Sooner or later you’ll run into one. You might even have to make one yourself. If you’ve never made a slideshow before, you might be sweating bullets. How are you, a novice designer, going to put together a professional presentation when asked? Well, here are some common design mistakes that you should always avoid. 1.