There are a few things you can do to help when selecting the inverse of an image in Photoshop. The first is to use the eyedropper tool to select the center of the image. This will help you to get a good, accurate inverse. Next, use the Marquee tool to select a small area around the image that you want to inverse. This will help you more easily control how your inverse looks. Finally, use the Inverse command on your keyboard (or press Command-I) to create your inverted image.
Invert vs Inverse in Photoshop
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