AI in Photoshop: How to use Generative Fill in PS

How to use Generative Fill in Photoshop.
1-Selection+Prompt.
-Deeply discuss about the feature of Photoshop's AI function, such as how to use the shape and opacity of selection guide AI and control the variation of generated results.
-Create different selection's shape and then use Generative Fill to generate the individual variation.
-Using quick mask or new channel to create the unique opacity of selection to guide AI generate variation that can blend with background.
2-AI remove+Remove Tool.
-Comprehensive analysis how to using Generative Fill to remove something.
-New workflow: Generative Fill+Remove tool+Clone stamp tool+Material
-Compare: Generative Fill Vs Remove tool
3-Generative Expand
-How to use Generative Expand.
-How to solve the image quality issue after apply Generative Expand.
-How to deal with the original content impact the result of Generative Expand.
-How to merge multi-photos by using Generative Expand.
4-How to build new AI workflow in composition.