Change the trademark of the goods in the picture to make a choice, and then put the picture you want in to adjust the size. This selection is a matting method. Photoshop has many methods and is a powerful image processing software. It has absolute advantages in matting synthesis and color adjustment. Why pave the way? What do you want to use to cut the picture? What do you mean by matting? Simply put, matting is to make a choice! For example, this blog introduces the commonly used! Photoshop magic wand background eraser matting channel matting pen pulls out the quick mask: press the shortcut key "Q" to switch the mode, and the quick mask is red by default, and then press the Q key to exit to get the color range of the selection; The matting is also used to select the desired color. Click the straw to control the color selection range, adjust the color tolerance, and then confirm. It is worth mentioning here that selecting/adjusting edges/can also be the role of feathering! The function of feathering is that the edge is not stiff. To feather C2 version of the shortcut key Ctrl+Alt+D, CS45 is shift+F6! Each version is different, so you can select/modify/feather/change related shortcut keys even though the versions are different. This blog will have an article introduction! Magnetic lasso tool/magic wand combined with repair tool is also a good choice to increase or decrease the choice. No matter what tools are used to adjust a part of the selection, a new channel will be formed in most cases! Calculation can also be made into a constituency! [Highlight Calculation] Perform "Image Calculation" on the image background. The parameters are set as follows: Select the "background" layer for both sources, select the gray color for the channel, set the blending mode to "positive overlay", and then confirm. Click on the channel panel, and we can see that the newly generated channel is the highlight result [dark tone calculation]. The parameters of "Image-Calculation" are set as follows: both sources select "Background" layer, both channels select gray, and the selection/inversion/blending mode is "Positive Overlay", and then confirm. Click on the channel panel, and we can see that the newly generated channel is the dark tone result [Midtone Calculation]. The parameters of "Image-Calculation" are set as follows: both sources select the "Background" layer, both channels select the gray color, the blending mode is "Exclude", and then confirm. Click on the channel panel, and we can see the newly generated channel, which is the middle tone result. Photoshop CS3 CTRL+ALT+SHIFT+~ Photoshop CS5 CTRL+ALT+2 The opposite of highlight is dark shortcut CTRL+SHIFT+I.