It’s nothing as powerful as the popular Photoshop software, but Preview gives you some image editing and color-balancing capabilities. When you open a compatible image on Preview, you won’t see these options outright; you’ll have to click the Markup button, which we’ve highlighted in other tips. If you’re having trouble finding the Markup button, it’s represented by a marker icon in a circle. You might not see the button if your window is small; in that case, just click the chevron-like arrow button in the top-right region to reveal more options.
Clicking Markup will reveal the Instant Alpha, Sketch, Draw, Shapes, and their corresponding border tools, amongst others. However, if you want to adjust the colors and size, you must go to the menu bar and click Tools. In that menu, you’ll find Adjust Color and Adjust Size. The former will let you adjust exposure, contrast, saturation, and more.
Finally, if you would like to see the information for the image (metadata), you only have to click the Inspector button (represented by an “i”). Here, you’ll see the size of the image, its creation date, what file extension it has, its size, and other useful bits of information.
