Can you tell me what mixed mode superposition is again? thank you

Normal Normal mode is also the default mode. Do not mix with other layers. Dissolution mode. The pixel color produced by the dissolve mode comes from the random replacement value of the mixed color, which is related to the opacity of the pixel. Behind the pattern. Edit only transparent areas of the layer. This mode is only valid when the LockTransparentPixels of the layer is not selected. Clear clear mode. Any editing will make the pixels transparent. This mode has nothing to do with the color of the brush, but only with the parameters of the brush. This mode is valid for shape tools (when the FillPixel option is selected), paint bucket tools, brush tools, pencil tools, fill commands and stroke commands. Dimming mode. Check the color information of each channel and the mixed pixel color, and select the darker one as the mixed result. Brighter pixels will be replaced by darker pixels, and the darker pixels will not change. Multiplication positive superposition mode. The color information in each channel is investigated, and the background color is positively superimposed. Its principle is the same as the "subtractive principle" in color mode. The color produced by this mixture is always darker than the original color. If there is a positive overlap with black, only black is produced. And mixing it with white won't have any effect on the original color. ColorBurn color deepening mode. Darkening the color of the bottom layer is similar to positive overlay, but the difference is that the contrast of the bottom layer will be increased according to the superimposed pixel color. Mixing with white has no effect. LinearBurn linear color deepening mode. Similarly to positive overlay, the background is darkened by reducing brightness to reflect the mixed color. Mixing with white has no effect. Brightening mode. Contrary to the dimming mode, the brightness of pixels mixed with each other is compared, and the brighter pixels in the mixed color are selected to keep and replace other darker pixels. Screen mode. According to the principle of color mixing in additive mode. That is, for screen mode, colors have an additive effect. For example, when red, green and blue are all maximum values of 255, mixing in screen mode will produce white with RGB values of (255, 255, 255). On the contrary, black means 0. Therefore, mixing with black has no effect in this mode, while mixing with white will produce white with the largest RGB color (RGB values are 255,255,255). ColorDodge color fade mode. Contrary to ColorBurn, mixed colors are reflected by reducing contrast and highlighting the base color. Mixing with black has no effect. Linear fade mode. Similar to the color gradient mode. The bottom color is brightened by increasing brightness, thus obtaining mixed color. Mixing with black has no effect. Overlapping mode. Whether pixels are mixed by multiplication (positive superposition) or screen (screen) depends on the underlying color. Colors will be blended, but the brightness details of highlights and shadows of the base color will be preserved. Soft light soft light mode. Whether the color of the picture is dark or bright depends on the color information of the upper layer. The effect is similar to placing a scattered spotlight on the image. If the brightness of the upper color (light source) is higher than 50% gray, the bottom layer will be illuminated (faded). If the brightness of the upper color (light source) is less than 50% gray, the bottom layer will darken as if it were burnt.

If mixed directly with black or white, it can produce obvious darkening or brightening effect, but it will not make the covered area produce pure black or pure white. HardLight strong light mode. Depending on the color of the upper layer, the positive film is stacked on the bottom layer or the screen and the bottom layer are mixed together. This effect is like shining strong light on an image. If the brightness of the upper color (light source) is higher than 50% gray, the image will be illuminated, and the blending mode is similar to the screen. On the contrary, if the brightness is lower than 50% gray scale, the image will be darkened, and the blending mode is similar to Multiply (positive overlay mode). This mode can add shadows to the image. If it is mixed with pure black or pure white, it is also pure black or pure white. Vivid and bright patterns. Adjusting the contrast to darken or lighten the color depends on the color distribution of the upper image. If the brightness of the upper color (light source) is higher than 50% gray level, the image will reduce the contrast and become brighter; If the brightness of the upper color (light source) is lower than 50% gray, the contrast of the image will be enhanced and darkened. Linear linear light mode. If the brightness of the upper color (light source) is higher than that of neutral gray (50% gray), the picture will be lightened by increasing the brightness and darkened by decreasing the brightness. PinLight fixed lighting mode. Replace colors according to the upper color distribution information. If the brightness of the upper color (light source) is higher than 50% gray, the pixels darker than the upper color will be replaced, while the brighter pixels will not change. If the brightness of the upper color (light source) is less than 50% gray, the pixels brighter than the upper color will be replaced, while the darker pixels will not change. Difference mode. According to the brightness distribution of the upper and lower colors, the color values of the upper and lower pixels are subtracted. For example, using the maximum white to do the difference operation will get the opposite effect (subtracting the lower color to get the complementary value), while using black will not change anything (black has the lowest brightness, and the lower color subtracts the minimum color value of 0, and the result is the same as the original). Exclusion exclusion mode. Similar to Difference, but with lower contrast. Similarly, when mixed with pure white, the opposite effect is obtained, while when mixed with pure black, there is no change. Tone mode. The parameters that determine the generated color include the lightness and saturation of the bottom color and the hue of the top color. Saturation saturation mode. The parameters that determine the generated color include the brightness and hue of the bottom color and the saturation of the top color. In this mode, mixing with the color with saturation of 0 (gray) will not produce any change. Color coloring mode. The parameters that determine the generated color include brightness of the bottom color, hue and saturation of the top color. This mode can preserve the gray details of the original image. This mode can be used for coloring black-and-white or unsaturated images. Luminance mode. Parameters that determine the generated color include hue and saturation of the bottom color and brightness of the top color. The effect of this mode is just the opposite of the color mode, and it is mixed with the lower color according to the lightness distribution of the upper color.