Editing Preview (macOS) (section)

==Features==
===Editing PDF documents===
[[File:Preview 7.0.png|thumb|Preview 7.0 screenshot]]
Preview can encrypt PDF documents, and restrict their use; for example, it is possible to save an encrypted PDF so that a password is required to copy data from the document, or to print it. However, encrypted PDFs cannot be edited further, so the original author should always keep an unencrypted version. A new "edit button" where the picture can be edited is introduced in Version 7. The "edit button" allows options to insert shapes, lines, do cropping, and among other things.

Some features which are otherwise only available in professional PDF editing software are provided by Preview: It is possible to extract single pages out of multi-page documents (e.g. PDF files), sort pages, and drag & drop single or multiple pages between several opened multi-page documents, or into other applications, such as attaching to an opened email message.

===Editing images===
Preview offers basic [[Image editing|image correction]] tools using [[Core Image]] processing technology implemented in macOS, and other features like shape extraction, color extraction, cropping, and rotation tools. When annotating images, Preview uses vector shapes and text until the image is rasterized to JPEG, PNG or another bitmap format. [[PDF]] and image documents can also be supplied with keywords, and are then automatically indexed using macOS's system-wide [[Spotlight (software)|Spotlight]] search engine.

===Import and export===
Preview can directly access image scanners supported by macOS and import images from the scanner. Preview can convert between [[image format]]s; it can export to BMP, JP2, JPEG, PDF, PICT, PNG, SGI, TGA, and TIFF. Using macOS's print engine (based on [[CUPS]]) it is also possible to "print into" a Postscript file, a PDF-X file or directly save the file in [[iPhoto]], for example scanned photos.

Beginning with Mac OS X 10.7 Lion, Preview restricts the Format option popup menu in the Save As dialog to commonly used types.  It is possible to access the full format list by holding down the Option key when clicking the Format popup menu.<ref>{{Cite web|date=2010-01-24|title=Convert Images in Mac OS X: JPG to GIF, PSD to JPG, GIF to JPG, BMP to JPG, PNG to PDF, and more|url=http://osxdaily.com/2010/01/24/convert-images-in-mac-os-x-jpg-to-gif-psd-to-jpg-gif-to-jpg-bmp-to-jpg-png-to-pdf-and-more/|access-date=2017-01-08|website=OS X Daily}}</ref> (GIF, ICNS, JPEG, JPEG-2000, Microsoft BMP, Microsoft Icon, OpenEXR, PDF, Photoshop, PNG, SGI, TGA, TIFF.)