Deleting a Wire Grid
Click on the Selection Box button in the main toolbar. By left clicking on the workspace and dragging a box with the mouse, a wire grid can be selected. All wires inside the selection box will be highlighted in light blue. Refer to Modifying a Wire Grid > or Modifying a Group of Wires > to see how to select multiple wires.
Got to Edit > Delete (Ctrl +Del) in the main menu to delete the selected wire grid. There is also a button on the toolbar with the Delete command. This command is enabled when a wire grid is selected.