Any files that are customized should be copied from the config/velocity subdirectories to the same subdirectory of the velocity directory under the server root (<serverroot>/velocity).
Note:

The files in config/velocity should not be modified. They are updated when the product is updated.

By default, any file of the same name under <server-root>/velocity will be loaded in place of <server-root>/config/velocity. This enables the preservation of customized files after a product upgrade.

Note:

After a product upgrade, review the files in config/velocity to determine if any changes should be incorporated into customized templates.