Select Model
> Object to display a list of objects.
Select one or more items in the list and then click the Delete button.
No confirmation dialog box opens. The object is deleted directed from the model.
Click OK to close the list and return to the model diagram.
Note:
You can select Edit
> Undo to undo the deletion.
You can restore the symbol in the diagram, by selecting Symbol
> Show Symbols and selecting the object's check box in the Show Symbols dialog box.