col-drag-drop (& grouping)

//inside vgrid element
<v-grid-col col-drag-drop="title:High; field:high" col-field="high"></v-grid-col>

To activate grouping both title & field needs to be added Dragdrop between columns is on by default, no need to add any. To disable dragdrop on 1 column set it to false col-drag-drop="false"