JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Modify a Referenceline To modify all referencelines in the active unit, use the following procedure. This procedure is used to modify existing referencelines. Note: You cannot add new referencelines or delete existing referencelines within this interface. Either: On the Home ribbon tab, select the Modify tool in the Reference Line group. Or Key in TDGEOMETRY REFERENCE MODIFYMULTI The Modify Multi referencelines dialog opens. Modify the referencelines in the table as needed. Click OK. Parent topic: ReferenceLines