Use the Reference Plane tool to draw reference planes to use as a guideline in your design. Reference planes are an integral part of family creation. For detailed information about creating families, see Creating Loadable Families. Reference planes appear in each new plan view that you create for a project. See GUID-4E36EDA0-2F4E-4619-B568-AC758E8D9770.htm#WSFACF1429558A55DE1E15DFEFE679E0029-7FC2.