By default, Mac users can view link previews in separate windows on Safari, letting them sneak a peek at the website they’re about to visit without clicking through. This can be useful for checking out headlines or other content before deciding whether a link is worth visiting, but the feature has never worked reliably on my Mac. It’s supposed to be activated by a force-click or a three-finger click on the trackpad, but either input can be so fiddly that I tend to avoid using link previews altogether. That recently changed, thanks to app developer Jeff Johnson, who discovered a keyboard shortcut, never disclosed by Apple, that reliably activates Safari link previews on Mac.

When using Safari on your Mac, hover over a link and press Command-Control-D. A link preview should appear each time. It’s still a little weird, because you can’t simply dismiss this link preview by pressing the Esc key on your Mac’s keyboard, but you can click anywhere outside the preview to dismiss it.

This shortcut saves me from having to open links in a background tab in Safari to view them later. It’s also much easier to open link previews while using an external mouse, where force-clicking and three-finger tapping aren’t an option. You can also use it on individual words to pull up Look Up, which shows the definition of the word alongside a bunch of other search results about it.

Please note that Link Preview in Safari for iPhone works properly. You can press and hold on a link to see a quick preview.