This sample illustrates a help entry and the information that it provides:
Inst> help upgrade upgrade U "upgrade" is a keyword argument for the "install", "keep", "list", and "step" commands. For example, "install U" requests that all subsystems that are currently installed and have newer counterparts in the software distribution be installed...Understanding installation terminology and the Inst installation model is very important to using Inst successfully. To get this information, issue this command during an installation session:
Inst>
help overview