How can I create a value pin at an action?

[tlaue]

I want to add a value pin to an action which is shown as a normal pin like for an object flow but with the arrow inside of the rectangle.
I want to use this to model for instance contants as input for an action.

How can I create such a value pin using EA?

[Eve]

You'll need to define a profile with a shape script on the stereotype.  See http://www.sparxsystems.com/EAUserGuide/index.html?add_shape_scripts_to_uml_profi.htm for details.