How to attach an invoice to a payment that's been made already

serlox22

I'm new to Wave. I'm new to accounting. I'm new to business.

So I've bought something from a company and they invoiced me for it. I paid that invoice via a bank transfer. I have uploaded the bank statement in Wave and it shows as an outgoing transaction.

Question: how to I... explain that, in Wave? In my mind - I attach their invoice to that transaction. Is that the way? Is there a better way?

serlox22

Anyone?