I want to change the shape of the object "Interaction" in Resource Architecture diagrams to remove the Antenna and ball icons at the ends and replace them with a regular arrow. I tried with the shape editor but did not manage to do it. Any idea ?
It is not changed in the Shape Editor. The beginning and end points of the interaction are managed by the DiagramTypeLink styles, ex.: look for the "INT - Interacting Element -> Interacting Element Endpoint" DiagramTypeLink ("Ce7Ve(tBALN0"). It has several conditional styles associated with it (same as conditional shapes for a MetaClass). Within the properties of a style you can change the DiagramTypeLink LineBeginStyle and/or LineEndStyle.