The explanation about YML in the official document is scattered. Is there a detailed explanation document?

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

The explanation about YML in the official document is scattered. Is there a detailed explanation document? For example, I have written a workflow and I want to edit it through YML. How can I change this? Do you have any relevant information

2. Additional context or comments

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