1. First, open the picture with reversed color. Note, if it is black and white, file-open, find and select the picture to be processed, and open it.

2. Now reverse processing, click Image-Adjust-Reverse in turn.

3. The black and white in the image will be reversed immediately.

5. For the inverted image, you can choose File-Save As.

The function of "inversion" in ps is to change a color into its complementary color. Colors separated by 180 degrees on the color wheel are complementary colors, also called complementary colors. In other words, each color on the color wheel has a complementary color, and their lines pass through the center of the color wheel. Inversion means changing a color into its complementary color. An image has many colors, and each color is converted into its own complementary color, which is equivalent to rotating the hue of this image by 180 degrees, and the original black becomes white at this time.