antlr-options-use-submenus

antlr-options-use-submenus is a variable defined in `antlr-mode.el'.
Its value is

t

Documentation:
Non-nil, if the major mode menu should include option submenus.
If nil, the menu just includes a command to insert options. Otherwise,
it includes four submenus to insert file/grammar/rule/subrule options.

You can customize this variable.