In the Details area for the object, click the Slots tab.
The Slots table, which can be empty, appears.
A Details Panel window opens.
Type a name for the Slot.
(Optional) Type a value in the Slot Type field. You can use this field to specify a data type for the slot or to provide a way to group slots together.
Type a value in the Values field.
Click Add to save the new object and close the Details Panel window.
Click Apply in the Details area for the object.