Chains level Document Templates are shared across all Organizations, with the goal being to ensure that all Users have clean, professional and appropriately branded Documents. These should not be modified unless it is to suit a Chain-wide need.
If you are a Chain Admin user, it is possible to Clone a Chain Document Template into an individual organization if needed.
Select the Chain from the Organization list at the top-right of the page
Click Templates & Files
Click Document Templates
On the selected Template, Click Clone
Enter a Title for the NewTemplate
Click Clone to Confirm
Scroll to Permission at the top of the page
Click on Chain
From the dropdown generated, select the Organization you wish to move the Document to
Click Save