You can do so many amazing things with PowerPoint—beyond creating stunning slideshow presentations. The dynamic, popular program is used for a variety of purposes, and not all applications require the same size slide.
Use Cases for Slide Sizes:
The standard dimensions used in most PowerPoints are: 4:3 (standard) and 16:9 (widescreen) aspect ratios. 4:3 is best viewed on a standard computer screen (think square!) while the 16:9 is best viewed on a widescreen computer screen (or tv!). Using the proper dimensions ensures the presentation is scaled suitably so that it does not appear warped. Widescreen is the default in most versions of PowerPoint.
When sizing slides, you can use one of three measures: centimeters, pixels or inches. You should change your slide dimensions before you start designing your slides. Altering the slide size after designing will distort slide elements.
If you design your slides before changing the dimensions, PowerPoint may prompt you with two options if it cannot automatically size your content:
To change slide size in PowerPoint 2010, do the following:
To change slide size in PowerPoint 2013 or 2016, do the following: