How to display a UML Joinspec on an activity diagram?

I can see how to define the joinspec conditions in the properties (options tab), however I cannot see how to display the joinspec on the diagram ({joinspec = }) in line with the standard.  This is fine if the model is being used as the presentation medium (as long as the viewer is aware of how the tool stores its data and displays it), however much of our content is put into diagrams, documents or website material, which generally do not gather all of that metadata and attribute detail.

Is there a way to display the joinspec on the diagram?

Currently using a workaround with constraint note objects, which is less than ideal as updates require two or more changes now.

any advice appreciated