Display Inherited Operations
You can configure a selected element in a diagram to display the complete operation set obtained from all ancestors in the element's type hierarchy, as well as those directly owned.
Access Element | Feature Visibility (Ctrl+Shift+Y)
On the 'Feature and Compartment Visibility' dialog, in the 'Inherited Features' panel, select the 'Show Operations' checkbox.
This diagram illustrates the behavior, where it has been enabled for each element in a simple hierarchy. The Child element inherits from all other levels of the hierarchy.