Add tracking number on order level instead on item level

Dear VillaTheme team

We just bought this plugin and we JUST LOVE IT SO MUCH. That’s exactly what we dreamt of and what we did manually with emails for so long time.

Just one question: while entering tracking numbers manually, it makes no sense to enter it on order item level (because we send all items of an order with one tracking).

How can we enter manually the tracking number on order level instead on item level?

Thanks a lot, kind regards

Wolfgang