On the device you may select the template on the order or invoice. that is at Main menu > Settings > PDF Documents > Email > Format
Main menu > Settings
PDF Documents
Email > Format
Select the option
Template PDF
Template HTML
On the web version you may do it at Main menu > Sales orders > select the order > Settings > PDF template
Main menu > Sales Orders
Select an order
Settings > PDF Template
Select the Template > Save
On the order click on the PDF icon to see the template selected