Use {{}} commands

From Pdf Customiser v2.0+, you can add variable custom text in certain fields using {{}} commands such as: 

• {{var order.xyz}}
• {{var sales_object.xyz}}
• {{var billing_address}} 
• {{var shipping_address}} 
• {{var payment}}
• {{var shipping}}

For the {{var order}} and {{var sales_object}} variables, you need to specify which attribute you want to display. For example:

• Use {{var order.customer_id}} for customer ID
• Use {{var sales_object.increment_id}} for invoice reference ID

Including static blocks is also possible, for example:

• {{block type="cms/block" block_id="cellphones-landing" tem plate="cms/content.phtml"}}