In the Extras → Modify Parts menu, the Delete Parts under Elements function is available, which allows you to remove parts under selected elements. Alternatively, you can use the
button in the CAD toolbar for this purpose.
If you have already selected the elements before calling the function, the parts under the selected elements are deleted directly. If no elements have been selected beforehand, a dialog box opens in which you can select the corresponding elements. The parts underneath are then deleted.