Unique Per Virtual User Button
Select the Unique Per Virtual User radio button to use the “VUNumber” Track System Property for the Track in which this Custom Property resides.
The value will be either a number or the string representation of one.
If this is given, the Custom Property’s value will be a string, rather than a number, and the string will be the number formatted as specified by the pattern. The standard Java object “DecimalFormat” is used to do the formatting, and any pattern accepted by that object can be used.
The Generated Values form will validate any entered pattern, and display the green check mark (shown above) to indicate a valid pattern. Note that if the pattern is played without this validation an error will appear when the Composition is played.