Expanding the graph
The Expansion tab controls how nodes expand when you double-click them or select a group of nodes and click Expand.
Dashboard filters: Restrict the nodes that are produced by an expansion to those present in the selected dashboard (applies the filters from a specific dashboard to the graph).
Relations - simple: Restrict nodes produced by an expansion to the selected relations.
Relations - aggregated: These are relations that aggregate nodes in their edges (edges are lines that connect any two nodes on the graph).