As you build a link chart from a knowledge graph, you can change how entities are arranged to better visualize the relationships between them.
By default, entities are arranged using the Radial Tree layout. However, several other layouts are available: Force Directed, Community, Simple, Smart Tree, Geographic, and Hierarchical. The layout used to arrange the contents of a link chart is indicated on the link chart context toolbar and is referred to as the current layout. Various operations that act on this link chart will use the current layout to process results. For example, when you add entities and their relationships, they are added in a manner that is appropriate for the current layout.
Simple layout
The Simple layout 
arranges entities in a
regularly spaced lattice pattern in which the size of the grid
depends on the number of entities.
Force Directed layout
The Force Directed layout 
considers the link chart as if it were a mechanical
system. The entities repel each other like two magnets aligned with
the same poles facing each other, while they are attracted to each
other by the relationships that join entities together. The
algorithm iteratively reviews and places entities and evaluates the
forces until equilibrium is reached. This layout allows you to
visualize entities in clusters that emphasize how they are
connected.
Community layout
The Community layout 
finds
communities, which are groups of entities that are closely related
to each other. A Force Directed layout is then used to arrange the
communities. The attraction forces along relationships between
entities of different communities are relaxed so that different
communities are more spread out than with the standard Simple
layout.
Geographic layout
The Geographic layout 
arranges spatial entities geographically using their geometry.
Spatial entities in which the entity has a null geometry and
nonspatial entities are displayed on the link chart, but their
placement and arrangement are determined using the Force Directed
layout.
Your organization's basemap is used by default as a backdrop to provide spatial context.
Smart Tree layout
The Smart Tree layout 
arranges
entities and their relationships as in nature, where the tree
starts from the trunk and all branches move out from that point. In
the link chart, the root entity is the starting point, positioned
at the left. The entities related to the
root entity are lined up in a row to the
right of the root entity, from top to
bottom in this example. Any entities related to those items
that aren't present in the link chart are added as another
row closer to the bottom, and so on.
The algorithm identifies the entity associated with the smallest network topology index and uses it as the root entity.
Radial Tree layout
The Radial Tree layout 
places the root entity for the tree in the center of a circle. All leaf entities for the tree are positioned around the outer edge of the circle. Entities at each level of hierarchy in the tree are arranged in concentric circles between the root entity and the outer circle.
The radial tree layout is the default layout used to arrange entities and relationships when a link chart is created.
Hierarchical layout
The Hierarchical layout 
is arranged similarly to the Radial Tree layout. However, an attempt is made to orient the majority of the relationships from the bottom to the top in which the origins for the relationship are positioned at the bottom and destination entities are positioned at the top.
The algorithm attempts to limit the number of places in which the lines representing relationships cross each other. In contrast with the Radial Tree layout, relationships are not allowed between entities at the same level in the link chart with the Hierarchical layout.
Apply a different layout to your link chart
A link chart's current layout is selected on the link chart context toolbar in the Layout Options 
drop-down menu. For example, if the link chart is currently using the default Radial Tree layout, the Force Directed layout is selected in the Layout Options drop-down menu.
- Click Layout Options on the link chart context toolbar.
- Choose a different layout in the drop-down menu.
All entities and relationships in the link chart are rearranged according to the new layout.