A summary of the main functions of the XAI Primer. The design space is structured into three layers, namely: the cluster layer (a), the item layer (b) and the network layer (c) that can be explored in an open-ended and serendipitous way. Guided tours (d) provide focused reading ofthe space by automatically panning and zooming. The exploration modes panel (e), the collection panel (f), the search bar (g) and the minimap (h) complete the interface, respectively allowing users to navigate across views, collect and download lists of items, search for authors or projects, orient them in space and highlighting the same items in the space.