The 'Options' button lets you choose various display features. Press 'Options' to get the following list. When the list appears, some items may be written in dim grey text. Such items are not selectable at that moment.

• Select region/country for simulation.

  Lets you select a country for a simulation. See 'Tutorial Help' for a complete description.

• Run another simulation.

  Lets you run an additional simulation for a country or region. The 1990 population is redisplayed for the new simulation. As you run the simulation, a new growth curve will be displayed in a new color, and new population totals will be displayed in the rightmost box. Up to three simulations may be run for a country/region.

• Run a simulation with year 2000 data.

  Lets you run a simulation with the official projection of values for the year 2000. These values come from the database and represent an official projection of growth.

• View birth and death rates:

  Switches between two modes for changing birth and death rates.

  When you select 'View birth and death rates,' '+' and '-' buttons appear next to the birth and death rates of each cohort in the population pyramid. Press these buttons to increase or decrease each rate.

  Read the 'Parameter Adjustment' section under 'Controls Help' for more information.

• Reset simulation:

  Clears and restarts the simulation. All information will return to the 1990 values. The population graph will be cleared of all growth curves.