| clone_and_merge | Create a local, altered copy of an options manager | 
| defaults | Request default option values | 
| inlist | Option checkers | 
| inrange | Option checkers | 
| is_setting | Find out if we're setting or getting | 
| options_manager | Create a new options manager. | 
| package-settings | Convenient options settings management for R | 
| reset | Reset options to default values | 
| reset_options | Reset general options in 'options' to factory defaults. | 
| reset_par | Reset graphical options in 'par' to factory defaults. | 
| settings | Convenient options settings management for R | 
| stop_if_reserved | Check for reserved option names. |