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How to Whiten Teeth in Photoshop

In this walkthrough, we've shared how to whiten teeth in Photoshop, so you can transform your subject's pearly whites and make them shine. 

How to Whiten Teeth in Photoshop
1. First, load your current Photoshop project and find the Lasso tool in the main Tools panel. Click and hold on the Lasso to bring up a submenu, and then choose the Lasso tool. This tool allows for fairly complex selections, even on the rounded areas of your teeth. 

2. Click on one corner of the subject's mouth, and then drag your cursor until all of the teeth have been selected. Make sure that only the teeth are within the lasso boundaries, and not another area of the mouth, like the gums or lips. Once you've completed a lasso selection, the solid line around the teeth will change into a dashed line. 

3. When you're happy with the selection, right-click on the teeth and choose "Refine Edge" from the menu. A new dialog box will appear, with options to soften or harden the Lasso edge. We recommend increasing the Smooth option a tiny bit, so that the edge around the teeth looks more natural. Then, press OK. 

4. To adjust the Hue/Saturation of your teeth selection, so that the teeth have a lighter tone, go to "Image" > "Adjustments" > "Hue/Saturation". You'll see a window with sliders for Hue, Saturation, and Lightness. 

5. Start decreasing the Hue until the teeth start to have a reddish tone. Then, decrease the Saturation until the teeth change to a near-white color. Lastly, you can boost the Lightness a little bit if you'd like a brighter smile, but go easy on this setting, because overly shiny teeth will start to look weird. 

6. While adjusting the Hue/Saturation settings, you can press Ctrl+D (or Command+D on Mac) to deselect the teeth so that they revert back to their original color. Then, you can press Ctrl+Z (or Command+Z) to undo the deselection and continue editing. This is useful if you only want to make subtle adjustments to the teeth, or want to quickly compare your changes with the original image.   

7. Finally, if your Hue/Saturation tweaks are still affecting other areas of the mouth, you can right-click on the teeth again and choose "Refine Edges". Experiment with different edge settings and adjust the Lasso boundaries until you reach a happy medium.  

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