To create a custom property:

1. Select the object to which you want to assign the new property.
2. In the Properties window, click Editor.
3. In the Property Editor that appears, select the Custom Properties pane.
4. Drag a property type from the Add Property area onto an object in the Destination area.
   Tip

   You can also use the Add button to assign selected property types.

   The custom property is assigned to the selected object.

5. To rename the custom property, select the custom property in the Destination area, double-click in the Name field, type a name and press Enter.
6. When you close the window, the new property displays in the Properties window.
7. In the Properties window, click the custom property’s Animate (A) button so that you can use it in constraints.
8. Connect the custom property to objects.

   See Animating with constraints, Mapping pose and keying group properties, and Creating a custom keying group.