A text item can be specified to accept only values within a certain range. This range is defined by the Highest Allowed Value and Lowest Allowed Value properties, found in the Data node of the Property Palette. The item will accept any values within the defined range, inclusive of the high and low values specified. If either the Highest Allowed Value or the Lowest Allowed Value is left blank, there will be no upper or lower bound on the range, respectively. If both properties are left blank, no bounds are enforced.