Current versions of ArcView contain very useful tools for visualization in the Legend Editor, including automatic color schemes, map forms, and classification. By double-clicking on the theme which you'd like to adjust in ArcView's Table of Contents in the View window, the Legend Editor appears. In the above example, the settings create a choropleth (Graduated Color) map of the field "Hhpctgrowt." The user has selected the natural breaks classification method (adjusted by clicking the Classify... button) in a seven-class dichromatic scheme. This scheme emphasizes the extremes in the data, with dark colors assigned to the very lowest (in this case, negative) and the very highest attribute values. The field, "Percentage growth in the number of households, 1990-1994," is most useful as an indicator of the fastest (and slowest) growing residential regions, and these extremes in the data should be highlighted. In the "Color Ramps" pull-down menu, different schemes may be selected, like "monochromatic" (value-difference) schemes, spectral schemes, and other commonly used schemes. Their relative appropriateness depends on the data being mapped and the argument being presented. 

The symbolization of each category can also be manipulated by double-clicking on the appropriate swatch of color in the Legend Editor. Options such as a change of color, a change of fill, or other symbolization changes are made available through the Palette Editor window which opens.

These are but a few of the many visualization options available to users of ArcView. Consult the documentation for other ideas.