References are modular objects that are stored in a fixed directory and can be accessed and used by any other modular page on the given website. Possible usecases include:
They can be referred to from different pages without having to create a whole new object for them every time, which makes maintenance easier.
Adding a new reference is done from the "Pages"-Tab of your backend:
Picture for Step 1: 
Referencable objects can be referred to from modular pages. To do so, simply create or edit a modular page and open the "Content"-Tab. Then click on "Add item" right under the "References"-section and choose the object you would like to add from the list. After saving your page, the given object will appear on the frontend.
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