First, create the nominal account for the new bank if this does not already exist.
Navigate to the Financials tab.
Click on the Accounts button.
From here click Insert to create a new nominal account and Save.
If required, create the sales ledger analysis code and set it as Bank Analysis using the button with the Red Text.
Navigate to the Debtors Tab.
Click on the Analysis button.
From here click Insert to create a new sales analysis code, ensuring that the button with the Red Text states "Bank Analysis", and the correct nominal accounts are being debited and credited.
Once created, click Save.
Once the codes are set up correctly, set the sales ledger analysis code as default in order to be picked automatically when creating receipts/bulk receipts.
Navigate to the Debtors Tab.
Click on the Analysis button.
Find and select the required code.
Now click on Default to set this as the new default bank in the Sales Ledger. This will now be automatically used as the default bank account.
The previous default will automatically be unflagged.
Note: A similar process will apply in order to change the default the default bank on the Purchase Ledger; the difference being that it will be a purchase analysis record (rather than sales analysis) which should be flagged as the new default.