Each topic is supposed to describe extensively one state, situation, or feature of the software.
Other commonly used ways to access context-sensitive help start by clicking a button.
Another way changes the pointer shape to a question mark, and then, after the user clicks a widget, the help appears.
An example of context sensitive help familiar to most Wikipedia users are the tooltips that show previews of links within articles, helping readers to determine whether following the link is valuable prior to shifting pages.
US patent 8151192, Jason Eric Black, "Context Sensitive Help", issued August 6th, 2009