I was confused what kind of "slides" this post was about when reading the title/intro, so in the interest of fighting clickbait: It's about designing PowerPoint

I was confused what kind of "slides" this post was about when reading the title/intro, so in the interest of fighting clickbait: It's about designing PowerPoint slides, not playground slides and not UI sliders either. Though I'm slightly disappointed there isn't a 10 part series about the principles of playground slide design.