How to use PS channel mode to finish and polish portrait photos? Let's have a simple tutorial! Let's take a look at the comparison before and after the repair. 1. First use the three tools in the spot repair brush to clean up the obvious acne on your face. How to use the three brushes: A. Apply acne directly with the stain repair brush. B. Repair brush: press and hold the alt key to clean the skin as a specimen, and release the alt key to apply acne. Acne will become the texture of the specimen. C. Repair tool: Draw a circle on the part with acne, and then move it on clean skin. Acne will become the texture of clean skin. 2. Find out the color point in the picture in the channel: in the channel panel, copy the blue channel (because the color point of the blue channel in the picture is the most obvious) and make a Gao Fancha reservation (filter-other-Gao Fancha reservation) with a radius of about 10. 3. Enhance the texture in Channel 2: carry out the strong light mixing mode on the channels in Channel 2 (Method: Image-Calculation-Select the mixing mode: strong light). Repeat the calculation for 3 times, and calculate the last alpha channel each time to generate 3 alpha channels. 3. Load the selection area of image stain: hold down the ctrl key and click the alpha3 channel to load the channel selection area. Ctrl+i key is reversely selected as the dyeing selection area. Click on the rgb channel, light up three rgb channels, and hide the alpha channel. 4. Highlight the black spots on your face: Go back to the Layers panel. Select the layer, click the adjustment layer in the lower right corner, and then select the curve. The curve is adjusted upward to highlight the black spots. 5. Add layer mask to the adjustment layer. Then brush the hair, flowers and other places with a brush. 6. Copy the acne layer in the first step. Then make a reservation in Gao Fancha. The radius is 1. The mixed mode becomes linear light. 7. Create a new layer-fill it with neutral gray. Change the blending mode to soft light. 8. On the newly created layer, create black and white and curve adjustment highlights. It doesn't have to be black and white. Adjust the curve as shown. 9. Draw the newly created layer with a brush. Enlarge the new layer with a black-and-white brush. The flow rate is 17 and the opacity is 20. Draw a layer of black dots. The white one is about the same color as the one next to it. 10. Finally, hide the curve of the new layer and the black and white adjustment layer. This is a smooth layer.