This element specifies the settings for the document grid, which enables precise layout of full-width East Asian language characters within a document by specifying the desired number of characters per line and lines per page for all East Asian text content in this section.
This element specifies the settings for the document grid, which enables precise layout of full-width East Asian language characters within a document by specifying the desired number of characters per line and lines per page for all East Asian text content in this section.
Reference: https://c-rex.net/samples/ooxml/e1/Part4/OOXML_P4_DOCX_docGrid_topic_ID0EHU5S.html