The MDG Technology for UPDM makes use of Enterprise Architect's 'Quicklink' feature to make it quicker and easier to create correct and consistent UPDM models.
When you select an element, the Quicklink arrow displays off the top-right corner of the element.
Drag the arrow away from the element and release it over empty diagram space. The Quicklink context menu displays, listing all the UPDM elements that could commonly be attached to the element, as shown.
Selecting the 'UPDM::Post | Commands' option in the above context menu creates a new Post element connected to the Organization element by a Commands relationship.