Add payment terms to bottom of invoice

Is there a way I can add some custom text to the invoice when they are printed out to include payment terms. Essential package.

Thank you.

For the backend invoice, you can edit the file "invoice" of the view "order" of the backend via the menu Display->Views and add your text there.
For the frontend invoice, it's the file "show" of the view "order" of the frontend that you need to edit.