Image shows the fields of an invoke activity. The General, Correlations, Sensors, Properties, and Annotations tabs display at the top. Below this is the Name field, the Interaction Type drop-down list, the Partner Link drop-down list (with one icon to the right), the Operation drop-down list, the Input Variable field (with two icons two the right), and the Output Variable field (with two icons to the right). The Help, Apply, OK, and Cancel buttons appear at the bottom.