Change an activity name and description
To edit the name and description of an activity, double click the activity shape and edit the values
To edit the properties of any shape in a process definition, simply double click the shape. This will display a properties editor on the right hand side of the screen. The name and description of the activity are properties of the activity shape. Double click the activity shape and then edit the name and description.
Click anywhere on the diagram outside of the property editing panel to close the panel.