This configuration variable affects whether the runtime sizes certain controls according to the rules from Version 3.0 or from the current version. If the current measurement code is causing your application to display incorrectly, then setting this variable to " (on, true, yes) will use Version 3.0 sizing rules instead. When V30_MEASUREMENTS is set to the default "0" (off, false, no), 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.