I’ve discovered that when I respond to emails on my Mac Book, the default Apple Mail programme started opening my new message windows in a split screen view. Previously this wasn’t happening, and instead a new message would be presented as an overlay on top of the whole mail window (I believe they called it a Modal Dialogue).
Don’t get me wrong, I like the split screen thing – but I always wanted to know where this setting was, and why it was now magically switched on since I wasn’t involved in this design decision. I’m a bit of an stick-in-the-mud sometimes and a tad pernickety about preserving my user experience.
Thankfully it’s easy to find – but in case you’re stumped, here’s where to enable/disable this experience. In Apple Mail, head over to Preferences – General (the first tab). At the bottom you’ll see a tick box labelled prefer opening emails in split view when in full scren.