Navigate to ** Administration>Printing>Edit print settings**.

You can enable print templates in the printing">print settings admin area. Once enable you can select a template collection from the list. Notice that most template collections are used only in the backoffice channel for printing purposes and for other channels or to attach to email the "Default" collection will be used.

To enable print templates overrides, navigate to Administration>Printing>Print settings and look into the QZ.IO PREFERENCES where you can find the Print template overrides.