I haven’t had a desktop computer in years—just laptops! And I’m a Mac guy (proud, since 1984).
But there’s a problem with Mac laptop keyboards that drives a lot of people crazy, and I want to explain how it works. Specifically, the Mac laptop keyboard seems to be missing a bunch of keys that I, as an InDesign user, need to use all the time, such as: Page Up, Page Down, Home, End, and Enter. But actually those keys do exist on the MacBooks they’re just hidden. The trick is to hold down the Fn (“function”) key in the lower-left corner of the keyboard, along with one or more other keys: So, for example, to press Page Up, you hold down the Fn key and press the Up Arrow key. In InDesign, I almost never just press Page Up; instead, I want Shift-Page Up (which is “go to previous page”). To do that, I press the Shift key, then the Fn key, then the Up Arrow key. Of course, the Fn key is usually used in conjunction with the “function” keys along the top of the keyboard.
Apr 25, 2014 Support Communities / Mac OS & System Software / OS X Mavericks Announcement: Upgrade to macOS Mojave With features like Dark Mode, Stacks, and four new built-in apps, macOS Mojave helps you get more out of every click.
For example, if you press F7, you’ll just make iTunes go to the beginning of the song but if you press Fn-F7, you’ll open or close the Layers panel!