This issue is meta issue for text grid related issues. There are two user configuration related to this. 1. Text Grid tab in Page Style dialog, user is able to select among None, Lines, Lines and Chars, and specify grid(base and ruby text) size related settings. Snap to char checkbox is enabled if user uncheck "Use square page mode". 2. Tools / Options / LibreOffice Writer / General / Use square page mode for text grid. The related odf1.2 attributes are : 20.296 style:layout-grid-base-height 20.297 style:layout-grid-base-width 20.298 style:layout-grid-color 20.299 style:layout-grid-display 20.300 style:layout-grid-lines 20.301 style:layout-grid-mode 20.302 style:layout-grid-print 20.303 style:layout-grid-ruby-below 20.304 style:layout-grid-ruby-height 20.305 style:layout-grid-snap-to 20.306 style:layout-grid-standard-mode