2.5.2 Toggling the display of definition items
You can toggle the display of definition items or item types by editing the COLUMN-HIDDEN environment settings parameter related to each definition item, or the TYPE-COMMON-DEF environment settings parameter related to each definition item type. You can display only the items used in the definition.
You can use these settings to customize the display only for definition items displayed when the template is opened. Hidden definition items can still be imported and exported. You can use Excel functions to temporarily display hidden columns.