- Editing a Clipboard Image - If you copy an image to your Clipboard from another app, you can quickly edit what's on your clipboard in Preview. To do so, copy an image, open the Preview app, and use the Command + N keyboard shortcut. Alternatively, choose File --> Open New From Clipboard in the menu bar.
- Filling Out Documents - When you open up a PDF in Preview, there's a whole toolbar of tools that you can use to fill out blank boxes. To access these tools, select the Markup icon (a pen in a circle).
- Signing Documents - With the Markup tools for editing PDFs, you can even virtually sign a document with your own signature. From the Markup toolbox, choose the signature icon, and select "Create New." From here, you can sign using your trackpad, or sign a white piece of paper with a pen and then hold it up to your Mac's camera. Both of these techniques work remarkably well, making it simple to get a virtual signature onto a digital document.
- Quickly Remove an Image Background - Preview is no match for software like photoshop, but there are some basic image editing tools included. If you want to remove the background from an image like a logo, there's a quick way to do so, with the steps outlined in detail in the video above. This feature really works best on images with a lot of contrast, such as a colorful logo with a white background.
- Photo Editing - In the same Markup toolbox that's been used for most of these tips, you'll find some basic photo editing tools for adjusting color, exposure, and other simple parameters. To open up these image editing tools, click on the little icon that looks like a triangle. You'll see options for exposure, contrast, saturation, temperature, tint, highlights, shadows, and sharpness, plus there's a histogram for more advanced edits.
- Adding and Removing PDF pages - If you open up a PDF in Preview, you can remove unnecessary pages or add additional pages. Using the Edit options in the menu bar, select Insert --> Page from File to add a new document to an existing PDF. Deleting is as simple as selecting the thumbnail view, selecting a thumbnail, and selecting delete. You can also use the sidebar to rearrange pages with simple drag and drop gestures.
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