The Explicit MPCs created in the Element menu can be selected for a given subcase. The highlight of selected Explicit MPCs is supported when this form is displayed. The All MPCs toggle indicates that all the Explicit MPCs already created or created later will be used for the subcase being created. The All MPCs toggle should be turned OFF in order to select MPCs. ‘MPXADD SID’ is the ID used for identifying the selected MPCs for the subcase.