Thanks so much @JaeAnnC for your speedy and helpful response!

I'm not quite clear, so let me see if I can get this...

I have recorded the transaction as a transfer and it shows in the column "Added or matched" as a transfer.  When I go into the detail, it shows a link to "2 online banking matches" and if I click this I see two entries, one is "manually added" and the other is "manually matched", with the option to unmatch. 

So I presume that I did it right?

I can't remember if I chose "match" before designating it as a transfer!

As you can tell, I'm a bit confused 🤯

To take another example, if I had a short term loan I paid to someone from one account, and then they paid me back into another account, I would like to record this so as not to show it as an income, but as a repayment of the loan.  Would the same matching principle apply here?

Thanks