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The “Search Manual” link on the current version’s home page, references a link of the form /SplunkCloud/7.2.9/Search/. Note the version in the link, instead bookmarks/links should only be used with the moniker /latest/ in the URL.
The Splunk Cloud Documentation Home, Figure 4., is a big picture view of the available content. Most people, depending on role, will spend 95+% on the Search app, and additionally some on Getting Data In or Adding Data, and some on Reporting/Dashboards.
With that focus of Search app, the only source of Splunk documentation ever needed is the Search Reference page, Figure 5.
The navigation on this page is slick and avoids page turns or opening new Tabs/Windows. The left hand side navigation has access to anything that would be needed, the center panel is the main content, and the right panel shows a dynamic table of contents in a consistent manner by command, usage syntax, examples.
A specific case of that is shown in snippet of Figure 6. When first landing on Search Reference, the Introduction Section is expanded, click on the 2nd nav-panel below it, Evaluation Functions which displays that section. As the nav-panel is further expanded it will list every search command/function in the Splunk language.
  Figure 4. Splunk Cloud Docs Home |
 Figure 5. Splunk Search Reference |
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