RM 4: Use Case Diagram : create an arrowhead association : possible?
Accepted answer
The reference that Doug gave you was for the Business Process Diagram and it does support directional arrows. However, the Use Case Diagram does not support directional arrows at this time.
One other answer
Hi Frank, If you are trying to establish direction of flow, would it maybe help to use a sequence flow connector, as shown in this help topic?
http://pic.dhe.ibm.com/infocenter/clmhelp/v4r0m1/topic/com.ibm.rational.rrm.help.doc/topics/c_process_components.html
http://pic.dhe.ibm.com/infocenter/clmhelp/v4r0m1/topic/com.ibm.rational.rrm.help.doc/topics/c_process_components.html