Preview

Preview is Apple's free PDF viewer, built into OS X. It's no mystery many Mac users have no need to step beyond the built-in tool.

If you've got PDFs to read, or images to view, Preview makes it easy. This built-in PDF file viewer allows you to view, work with, and print PDF files; view and edit images (including JPEG, TIFF, GIF, PICT, and other image file formats).

Viewing PDF Files

To view a PDF file, just double-click it to open it in Preview. The first page of the file displays in the main window, while a side drawer shows its contents (if the drawer isn't displayed, click the Drawer button at the top of the window.
To view the PDF's table of contents in the drawer, click the TOC button (the button with four lines). Click the disclosure triangle on any chapter to view a list of its subjects, and select a title to display the page in the window.
To view thumbnail images of each PDF page in the drawer, click the thumbnails button (the two squares and two lines button). To view a page, select a thumbnail to display the page in the window.
You can also navigate pages by typing a page number in the Page field, or clicking the Next or Previous buttons.
If you're having a hard time reading a document, click the Zoom In button to magnify the page.
If you'd like to bookmark a page so that you can come back to it the next time you open the file, choose Add Bookmark from the Bookmarks menu. In the resulting dialog, type a name for your bookmark and click Add. To open a bookmarked page at any time, choose the page from the Bookmarks menu.
If you need to fill out information in a PDF form, choose Text Tool from the Tools menu. Then click a field and type in your info. If the field doesn't highlight in blue, the PDF isn't a form that you can fill out.
To copy text in a PDF document, use the Text Tool (as shown in the previous step), and drag across the text that you want to highlight. Choose Copy from the Edit menu (or press Command-C), and then paste the text in your application of choice.