Yes. You can navigate to Settings >> Workshop Details. In the Invoices dialog, next to the "Invoice template" label, click the "Select" link.

On the Invoices dialog there is also an option to edit the 'Invoice Footer'. Click inside the empty text box the right of the label. and it will be available to edit and add your preferred footer.

Then select an invoice from the list of templates, by navigating on the '< ' and '>' buttons at the top of the pane.
This will become the invoice template used in your workshop.