Display image page number label

In the Thumb view panel, a label is displayed for every display image. This Page Number label is displayed under every display image. Every label starts with "PG" and is followed by the Page Identifier of the same page in batch.xml. The application.properties file includes a switch that regulates whether page identifiers start from 0 or 1. The name of the switch is page_identifier_start_from_1. By default, the value of the switch is false which means that page identifiers are generated from 0. If you want to start the generation of Page Identifiers from 1, change the switch value from false to true.