When the Interface item of the navigation window is selected, you can use popup dialogs and mouse gestures to edit the interface elements of function block, device, resource and adapter interface types.
Elements can added to the interface using the New option of the popup menu which appears by clicking in the body of the interface drawing.
An interface element can be edited by double-clicking on its type name, e.g., EVENT or BOOL.
Additional editing options such as moving the element up or down are given by the popup menu obtained by right-clicking on the element's type name.
An event can be associated with a variable by using the Alt+Drag gesture between the event's type name, e.g. EVENT, and the variable's type name, e.g., BOOL. Using this gesture where an association already exists will delete the association.
An interface element can be deleted by using the popup menu obtained by right-clicking on the element's type name, or by using the Alt+Del keychord when the element is selected. If the element is in use, e.g., in an ECC transition or a function block diagram in the body of a function block, it cannot be deleted.