This variable affects whether the runtime sizes certain controls using the rules from ACUCOBOL-GT Version 3.0 or from the current version. Setting the variable to "1" means that Version 3.0 sizing rules are used for controls. When V30_ MEASUREMENTS is set to the default "0", then the current sizing rules are in effect. The related configuration variables, V31_MEASUREMENTS and V32_MEASUREMENTS have the same effect of setting the sizing rules to that of their respective versions.