I know how to edit links in top navigation and do drag-drop to create nested dropdowns - see attached image. I've already done one for our office locations, but when I added "Customer Service" and needed to add it as a dropdown under "Sales", it would no longer let me - the Customer Service link just slides to either side of Sales but refuses to go underneath. I was able to add it as a dropdown within the existing dropdown for Locations, but it won't let me add it under Sales. Also, it shouldn't matter but Customer Service IS a subsite of Sales. I've tried making the change in Edge, IE and Chrome, to no avail.