The Format utility provides a help facility that you can use whenever the Format utility is expecting input. You can request help about what input is expected by typing a question mark (?). The Format utility displays a brief description of what type of input is needed.
If you type a ? at a menu prompt, a list of available commands is displayed.
The man pages associated with the Format utility include the following:
format(1M) – Describes the basic Format utility capabilities and provides descriptions of all command-line variables.
format.dat(4) – Describes disk drive configuration information for the Format utility.