The High Pass filter allows you to sharpen your photo by enhancing the edges in your photo. It can be particularly useful for portrait photos and you can control where the sharpening occurs by using layer masks. To apply High Pass sharpening, press Command-J (PC: Ctrl-J) to duplicate the layer to be sharpened. Change its blending mode to Overlay (it will look weird at first), and choose Filter>Other>High Pass. Once the filter dialog opens, the image will look normal again. Adjust the Radius amount to control how much sharpening you want to apply, and click OK. 

This tip originally published in Colin Smith’s “Photoshop Tips” column in the March, 2023 issue oPhotoshop User magazine.