Population. Select the Population layer to display population information on the geography background of the US History layer. The disposition of US citizens and native people can be viewed in any year.
    The movie will PLAY the entire history (without narration) in one minute on a super fast computer. On a slower computer the simulation will slow appreciably. The population layer, in contrast to the US History layer, is an exact simulation of history.
    Population density (light tan) and the percentage of slaves (red) change over time. Cities are represented by thin orange cylinders. Click PAUSE and roll over a city to show the city's name; click it to show the population in that decade. Native American nations are shown in yellow text. They dissolve into reservations; click a reservation for detailed information.
    Orange arrows indicate major migrations. Roll over an arrow for a brief description. Click the arrow to play a brief narrated movie. Click the CLOSE button in upper left corner to close the narrated window.

Settings Panel. On the bottom left of the population layer is a "Settings" tab: click it to expand the Settings Panel. It provides a palette of data types for display. Change settings at any time; they remain in effect throughout the session.
   Key tabs. Click one of these tabs to open a scale of the data for that option. Click "i" for further information on how the data can be interpreted.
   Data types. These are the kinds of data that can be displayed. Select the desired data by clicking the square button just to the right of the name.

  Narration Button: Plays the eight movies on migration in chronological order. Normally off.
  Arrows Button: Displays large orange arrows to indicate major migrations. Roll over an arrow for a brief description and click invoke the appropriate narrated movie.
  Population Button: Displays population density by counties. The key shows the levels graphed. Population data changes every decade when the US census is taken.
  Cities Button: Displays the important cities in each decade. They grow over the course of this history. Roll over a city to see it's name; when the name is up, click for the current decade's population.
  New cities Button: Displays the names of new cities added at the beginning of each decade, when they have over 10,000 inhabitants. Normally off.
  Slavery Button: Displays slavery in red from 1790 to 1860. Click the key to gauge the percentage of the population held in slavery.
  Native Americans Button: Native American nations are indicated by tribal names. Roll over the tribe's name to bring up its original range. Click it for information on that tribe. Eventually the name transforms into one or more reservations. Roll over a reservation to show all the reservations that the dominant tribe occupies; hold button down to display a table with information on the reservations. Drag out (hold button down and move it) to see tribal information.
  Default Button: Selects the data types which come up when the movie begins.
  All off Button: Turns all data off, leaving only the background to change over time.
  Help Button: Displays help specific to the settings panel.

Narration movies. Eight narrated movies illustrate the major migrations before 1850. They are accessible in three ways.
   1) Large orange arrows appear in the course of the history. Each represents a major migration. Click the arrow for the appropriate narrated movie. (The Arrows button must be on for this option.)
   2) To play all the movies in order, turn the Narration button on, REWIND to the beginning and click PLAY. The simulation will play silently, but as each orange arrow appears, it automatically plays the movie, thus relating the early history of the United States in terms of people and their movements. (After the last movie, Narration is turned off.)
    A warning light shows to the right of the top header when narration is on. Narration should be off normally, as it may causes erratic behavior when the pointer is moved.
   3) As a third method, click the Narration Movies tab to bring up a list of the eight movies. Click the arrow just right of the movie name to go to the appropriate period and play just that movie.

Map insignia. At the lower right corner of the population layor is an insert which shows the year, the total population in that decade, and, if before 1865, the number of slaves.
Urban/rural clock. At the top of this map insignia is an "urban/rural clock," which indicates in yellow the percentage of people in urban areas versus the percentage in rural areas in green. A faint number in darker green is the approximate percentage of urbanites for that decade.
Year buttons. The two triangular "year buttons" can be clicked to go forward or backward one year. This is useful in the period from 1910 to 2000, which is compressed to match the original "Growth of a Nation." However, as stated above, the population data only changes at the beginning of each decade, when the census was taken.
Borders and Names buttons. These buttons allow two quick settings. Click the "B" or borders button to see a faint grid of the final states, which is useful over early virgin land or territories. Click the "N" or names button to enable showing of the names of states or territories, as in the US History layor.