Preview and PDF Options in OS X Mountain Lion
To see a preview of what your printed page will look like in OS X Mountain Lion, choose Open PDF in Preview from the PDF pop-up menu in the bottom-left corner of the expanded Print sheet. When you do so, you see the page or pages that you’re about to print displayed by the Preview application.
If you have any doubt about the way a document will look when you print it, check out Preview first. When you’re happy with the document preview, just choose File→Print, press Command+P, or click the Print button at the bottom of the Preview window. Or click the Cancel button to return to your application and make changes to the document.
Preview works with the Preview application. With the Preview feature, you can do cool things like these:
See all the pages in your document the way they will be printed, one by one.
Zoom in or out to get a different perspective on what you’re about to send to the printer (pretty cool!).
Rotate the picture 90 degrees to the left or right.
Spot errors before you print something. A little up-front inspection can save you paper, ink/toner, and frustration.
Check out the Preview program’s View menu, where you’ll find (among other things), four useful views: Content Only, Thumbnails, Table of Contents, and Contact Sheet, as well as the zoom commands and more.
While you’re checking out menus, you won’t want to miss the Tools menu, which lets you rotate pages, move forward or backward (through multipage documents); and unleash the awesomeness of the Magnifier.
The Magnifier tool is so very darn cool that it has a rare single-key keyboard shortcut. That key is the ` (the grave accent, which shares a key with the tilde); press it to show or hide the Magnifier. One last thing: Many of the tools and commands mentioned in this section are also available in the toolbar.
Add or delete buttons from the toolbar by choosing View→Customize Toolbar.