An Elementset is a group of elements. The Motion Preprocessor does not support control of the visibility of an Elementset. The Preprocessor only shows the number of Elementsets in the Flexible Body properties window. An Elementset is used for controlling visibility in the Postprocessor and is created by using the Named Selection that is defined in the Ansys .cdb or .inp file. An Elementset is supported for nodal and modal FE bodies.