See Layout Style for more information on the drop-down options.
Place children on common radius—Enables tighter drawings by using adapted
radii for child entities. By default, the entities in tree-like structures
connecting to a circle are always placed on a common radius according to their
distance from the root entity. Tighter drawings can be achieved by abandoning
the common radius and instead placing these child entities using radii adapted
to the size of an actual child entity and the sizes of entities in its vicinity.