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Erase Image Content in Preview with Copied Color Blocks

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Apple’s Preview is a surprisingly capable graphics editor for making quick changes to screenshots and other illustrations, but it lacks a built-in way to delete content while leaving the background. Here’s the workaround—select a rectangle of the background color, copy it, paste it, and then move it over the undesirable content—as shown in the After screenshot below, where blue selection dots denote the pasted box. As you resize the box, press Shift to prevent it from resizing proportionally, which helps you make it the shape you want. If you need a second box of the same color, Option-drag the first box to copy it. When you save and close, your boxes will be merged into the image, permanently removing the content underneath, so make sure they’re in the right spot before moving on.

(Featured image based on an original by iStock.com/Seetwo)

Social Media: Have you ever needed to remove some content from a screenshot or other illustration? There’s no need for a fancy graphics app—you can do it quickly in Preview with this little-known trick.

Convert Image Formats Directly in the Finder

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If you need to convert images to JPEG, PNG, or (unlikely) HEIF, try this hidden Finder feature: Control-click an image in one of those formats or other common image formats like TIFF, GIF, or PSD, and choose Quick Actions > Convert Image. A dialog lets you choose the destination format, the image size, and whether you want to preserve metadata. For straight conversions, stick with Actual Size, but if your goal is to shrink the file as well, you can choose a smaller image size. Leave Preserve Metadata selected unless you want to remove things like location metadata for privacy reasons. You can even select multiple files to convert them all at once.

(Featured image based on an original by iStock.com/marekuliasz)

Social Media: A hidden feature of the macOS Finder lets you quickly convert selected images from their original format to JPEG, PNG, or HEIF. If you regularly need to convert images between formats, it could save you some time.