The grid can define a grid which snaps all East Asian characters to grid positions, but leaves Latin text with its default spacing; a grid which adds the specified character pitch to each character on each row; or a grid which affects only the line pitch for the current section.

Reference URL：https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.wordprocessing.docgrid.type?view=openxml-3.0.1