modify Last update: 16.07.2026 ElementSet.modify(op='new', element_labels=None, element_sets=None, x=None, y=None, z=None) General method to modify the elements in an element set. Parameters op: Selection method. Valid options: new, add, remove, intersect, and inverse. element_labels: List of element IDs. element_sets: List of element sets. x: Min and max of x location. y: Min and max of y location. z: Min and max of z location.