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About Preview

In addition to viewing PDF and image files, you can alter them, convert them, and add your comments.

Viewing PDF and image files
View many types of files, including PDF, JPG, GIF, HDR, TIFF, PSD, PICT, PNG, BMP, RAW, and SGI. Use bookmarks to find your files and then use a slideshow to show them off. And when you’re viewing a PDF file, you can move around it quickly by searching it or using its table of contents.
Editing PDF and image files
Crop, rotate, or flip an image or the pages in a PDF file. With an image, you can remove its background to leave just what you want. With a PDF file, you can remove pages, add pages, or just move them around.
Annotating PDF and image files
Add your comments with a note and highlight important areas with circle or rectangle. In a PDF file, you can add links to websites and other pages in the PDF.
Taking screen shots
You can take screen shots and edit them directly in Preview.