If you have already defined fixture types, they can be inserted into the floor plan of any store.
You can add a new shelf to the fixture directly in the fixture preview in the Component tab.
Fixtures or any other components must always be inserted into the activated version of the layer. You activate the layer version in the right panel under the Stores tab.
The hanging system must be set in the Fixture Properties tab. In the Hanging System section, you can set various properties related to the hanging system. It is essential to check the box Use Hanging System. This will be reflected in the fixture preview by a dotted background of the fixture.