Many Mac users arriving from the land of Windows PC keyboards will notice that the Apple keyboards as well as those included on a MacBook, MacBook Air, or MacBook Pro do not have the standard “Page Up” and “Page Down” keys. This does not mean you can’t page up and page down on a Mac, however, and, similar to the Home and End functions, there are two distinct ways to accomplish the equivalent of paging up and paging down on any Mac keyboard with OS X.
Let’s quickly review the keystrokes to accomplish paging on Mac keyboards.
Page Up with Fn + Up Arrow
The “fn” key is at the lower left of all modern Mac keyboards, and when you combine that with the Up arrow, which is found on the lower right of the keyboard, you will perform the equivalent of a page up.
Page Down with Fn + Down Arrow
Paging down is done the same way as paging up, using the same “fn” key and the Down arrow to perform the equivalent of a page down on a Mac keyboard.
Yes, this is the same on all Mac keyboards, including the Apple Wireless Keyboard, the MacBook Pro keyboard, MacBook Air, and MacBook keyboards. The Apple Extended Keyboard has dedicated Page Up and Page Down keys, but this Function+Arrow trick will still work on that keyboard as well.
Speaking of Function key tricks, those arriving from the PC world may also find it useful to know that Function+Delete does the Mac equivalent of the DEL key on PC keyboards, and there are many other function key modifiers to perform similar actions on the otherwise more minimalist keyboards commonly seen on Mac hardware.
Knowing the appropriate Page Up and Page Down shortcuts can be particularly helpful with other text navigation keystrokes like these.
Of course another approach would be to modify the scrolling speed for the trackpad or mouse the Mac is using, but that’s obviously not using the keyboard.
Back to the keyboard, most web browsers on the Mac support alternate Page Up and Page Down methods as well by using the spacebar. Not all apps support this method, but nearly all web browsers do:
Web Browsers: Page Down with Spacebar
Assuming the cursor is not in an active text box, hitting the Spacebar will Page Down in Chrome, Safari, and Firefox.
Web Browsers: Page Up with Shift + Spacebar
Again, assuming the cursor is not selected into an active text box or the URL bar, hitting Shift+Spacebar will perform a Page Up in Safari, Chrome, and Firefox.