This page explains how Global Parent Page mapping works in the Domain Mapping System plugin.
Global Parent Page mapping allows you to map all the Child Pages of a Parent Page automatically, without having to manually search/select each one in the plugin settings. Here's a brief video about how to set it up, or feel free to read the guide below:
The first step is to enable the Global Parent Page Mapping checkbox:
When Global Parent Page Mapping enabled, any pages that are associated with Parent Pages will automatically get mapped to the same domain as the Parent Page.
By default, WordPress retains the subdirectory URL structure of the child pages, so we have added the option to Remove Parent Page slugs from mapped Child Page URLs: