How to find an existing documentation page?

[prjemian]

I still struggle when trying to find a page of documentation that exists. The struggle centers around:

• Which section has the document? (demo, howto, tutorial, ...)
• What's the title of the document? (to find it in the section's list)

What tools (in addition to text search) will make it easier to find a documentation page?

[prjemian]

Might help to document a couple test cases.