How to split screen on Mac

Multitaskers, this is for you. If you work with multiple apps and windows at once, you might find it frustrating to constantly switch back and forth between those windows. Or maybe, depending on what you’re working on, you need to look at two windows at the same time. If you’re copying info from one document into a spreadsheet, for instance, it can help to see those two windows side-by-side.

https://mashable.com/article/how-to-split-screen-mac/?europe=true