There are a few simple commands you can use within GNU Backgammon to display information you might need to know:
help [command]
? [command]
help by itself
lists the main commands with a one-line description of each; when
command is specified, that command is explained in more detail,
and if it has any subcommands then they are listed in brief.
? is a synonym for help.
show copying
show warranty
show copying and show warranty commands, or see the file
`COPYING' in the @gnubg{} distribution (the contents are identical).