1. First open PS to import a picture.
2. Click the filter in the menu bar. Let's have a look. Many filters are grayed out, that is, they cannot be used.
3. Many people will be eager to uninstall and reinstall the software ... In fact, you can try clicking the image mode to see the color settings of the image.
4. Change the color to RGB mode and the channel to 8 bits.
5. Check the filters again, and now all the filters have been restored to the available state.
6. The above method is simple, but many people will ignore it. RGB mode is the most commonly used and important mode in digital images, so all functions in PS support practical use. 16 bit channel can't print or print, so some filters can't be used. So you can usually set the PS image mode to the above settings.