How to obtain offline file like .chm?

ROOT
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I want to obtain class or others reference like the figure up, can i download it or generate it using some software?
Please read tips for efficient and successful posting and posting code

ROOT Version: 6.24
Platform: windows 10
Compiler: vs2019

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The master version of the ROOT reference guide is available here.
You can also see older versions and download them (as html) from here.

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