After working in the Family Editor to create or modify a family, you can load the family into one or more open projects.
If only one project is currently open, the family is loaded into that project, and the project displays in the drawing area.
Optionally, you can click Create tab Family Editor panel (Load into Project and Close). You will be prompted to save the family which will close after it loads into the selected project.
In either case, if only one project is currently open, the family is loaded into that project.