As you can now set the default template for all documents (invoices, estimates, retainers) in Settings -> Stationery Templates (more here), you can also choose a special template for each client you have.
Just go to the Update Client page -> ‘Client Default Settings’:
Next, click on ‘Default Template’ field and choose the template:
Save client updates and from now all invoices/estimates/retainers related to this client will use this template.
