Below a repost from 3 years ago, an blog post I put out on a Medium publication that I am taking down. Putting it out here to preserve it.
You can design better presentation slides by getting rid of engrained habits that can go back decades.
Sometimes I work with teenagers to teach them about presentation design. To my surprise, they often are much better students than “grown ups” who are supposed to benefit from decades of business experience. Here is a theory why.
Transparencies for overhead projectors encouraged you to copy pages out of a book and uncovering paragraphs or key points bullet by bullet. Moving to PowerPoint, people just kept writing these bullets.
The first visuals that you felt compelled to project to an audience were data charts: lines, bars, columns. These type of graphs needed to have a title in the top left and a source at the bottom. Most slide designs today use a big title at the top left, other typography on the page is almost never bigger than the title. Very rarely, people leave the title out all together.
Pictures are low resolution and take a lot of memory, hence you can only put in small images in a presentation document that you need to email someone.
PowerPoint was created as a mouse-based drawing software, rising alongside Microsoft Windows. Everything could be dragged, and resized easily to fit. Cropping an image was tricky. The first plasma TV screens confirmed to us that it was OK to stretch an image out of proportion, as long as it fitted whatever you needed to fill easily.