KEYWORD "and how it operates"

Text here describes the KEYWORD directive/command/statement and what it does.

REM -- use the KEYWORD in code

This text talks about the above code and offers further explanation if needed.

Use sections to describe additional usage details. If a keyword has multiple use cases, each use case should have its own syntax, examples, and description of use. In that case, make that fact clear at the top of the page before describing each use case.