Why are there black bars on the sides of my presentation on iPad?

iPad screen resolution and aspect ratios can vary

When viewing a presentation on certain iPads, black bars may appear on the sides of the presentations.

This is because for iPad, presentations are scaled to a 4:3 aspect ratio, which is the most common aspect ratio for iPads.

Here is the list of iPads where you will see black bars when presenting:

iPad Aspect Ratio
iPad Mini 6 (2021) 3:2
iPad Pro 11″ (2018-2022) 10:7
iPad 10 (2022) 23:16
iPad Air 4 (2020) 23:16
iPad Air 5 (2022) 23:16