Optimizing table code
Optimize the code of a table to improve the client-side performance and enable customization of a toolbar for that table.Hierarchical table layouts are optimized by default. See Enabling additional hierarchical table settings.
In the Section form, click the table that you want to optimize, and then click the View properties icon.
In the Layout properties window, for the Optimize code parameter, select the Allow check box.
ArticleEnabling grouping by fields