Another improvement to our accounting software based on feedback from our customers:
When you create an invoice as a PDF, it is named “invoice-123.pdf” (Assuming the invoice number is 123 and you haven’t renamed “Invoice” to something else).
So if you click the button to save a PDF invoice , that’s the name it defaults to, and when you email an invoice that’s the name of the attachment.
You can now re-configure this naming convention to pretty much anything you like. This is set in Settings -> Advanced Settings