In Settings>PDF Themes>Default Theme>Misc options, there is a field for 'Additional text' that can then appear on invoices, quotes, POs and packing slips. We enter our bank details here for UK and International payments so that they always appear at the foot of our invoices.
What we really need is for this text to also appear on our statements. Bank details for incoming payments are only really needed on invoices and statements - seems pretty pointless on a packing slip! We have queried this with Kashflow and they have confirmed that editing statements is not something that is currently offered. This seems like a basic oversight and we would hope that this could be rectified fairly soon.