button and select the Channel or Footpath you want to modify.
On the channel tools toolbar, click the 
delete amorphous item button.
To access the tools for modifying road channels and footpaths click the button and select the Channel or Footpath you want to modify.
On the channel tools toolbar, click the delete amorphous item button.
If there are any amorphous items on your design the button will remain selected and each amorphous item will highlight as you move the cursor close to it. Click the mouse to select and then confirm you want to delete it.