Clusters, once on the User Interface Canvas, can be reordered at any time; this is especially important for Attribute Clusters, in that these are always added as the last Cluster on a Page. Clusters of any type can be reordered in exactly the same manner - this method applies equally to Attribute Clusters, Address Clusters, Related Case Participant Clusters, Related Employment Clusters and Comments Clusters.
To reorder a Cluster, click on a white-colored area of the Cluster to be moved (close to the top of the Cluster is ideal), and, holding the left mouse button down, drag it to the area directly above another Cluster. When the Cluster is over an area onto which it can be dropped, the drop area will change color to light blue. Finally, release the mouse button, and the Cluster will move to its new position.