- Click on Reports / Business / Printable invoice
- Click on the "report options" icon at the top.
- Customize the options and choose the invoice number.
- Once the result is good, click on the print icon at the top.
To change or create Stylesheets to customize colors and logos, you can go in
Edit / Style sheets
To change the name and address of your business that shows on all invoices, you can go in
File / Properties