[FEATURE]: Describe user-facing features in documentation

[drone1]

Summary

Specifically, what is "Master area" vs "The layout's end" in "Spawn windows at"? I can't find it in the docs.

Thanks a lot.

A clear and concise description of what you want to happen

Describe the user-facing features in the documentation.

A clear and concise description of any alternative solutions or features you've considered.

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Additional info

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