A scale range specifies the zoom level at which a particular style is applied to the display of your features. When the zoom level of the map is within the specified scale range, AutoCAD Map 3D toolset redraws the features using the style associated with the scale range.
This illustration shows how roads and other features appear at three different scale ranges.
The style is applied when the zoom level is greater than or equal to the From value and less than the To value. When setting up adjacent scale ranges, use the same To value as the next range's From value. For example, if one range is 0 - 20,000 set the next range to 20,000 - 40,000.
Note: When setting up multiple scale ranges for a map, make sure that they do not overlap. For example, the ranges 500,000 - 5,000,000 and 2,000,000 - 10,000,000 overlap. In such cases, when the zoom level is within the overlapping scale range, AutoCAD Map 3D toolset displays the features using the style of the first scale range listed.