With this property you can have the information displayed in the page properties or in a plot frame on the number of pages including the present one exist with a specific property (for example Page "4" with higher-level function "A31"). The property is specified in the "Number of pages / Page name per property" project setting. A report run is used to count the pages with the same value as this property, and the counter is written to the "Page counter per property" property.

Reference

PagePropertyList Class
PagePropertyList Members