Legend:
Each circle is a node;
a group of circles is a cluster
Activities:
Select node: left-click node
Select multiple nodes: ctrl+left-click nodes
Group selection of nodes: right-click + Cluster + name the cluster
Open cluster: double click cluster
Unselect node/cluster(s): left click on empty page
Untie the cluster: double left-click cluster (regroup them via the cluster nodes button)
Change colour of node: double left-click on node
Fixate position of node/cluster: press space bar when dragging to fixate in-place.
Cluster additional source types: