Hi,
When investigating why the "Columns" and "Rows" settings have disappeared from Special:Preferences, I noticed your documentation change. Do you happen to know where I can read more about why this was changed? It must have happened recently, because the settings still are available in the latest stable software, 1.28. However, I cannot find anything about the change in MediaWiki's 1.29 Release Notes, so I am wondering whether or not removing these settings was deliberate.
Best regards, Kjetil_r