A bar field is a form field that appears as a rectangle that represents a numeric value. The bar is displayed against a background, and the bar size compared to the background size illustrates the proportional value of the field. You specify the background size, and OpenROAD calculates the bar size based on the field's current value. Typically, a bar is sed for display only.

Bars are especially useful for creating bar graphs. Another effective way to use a bar is as a “percentage completed” indicator. A bar used in this manner provides feedback to the user about the progress of an activity.