In order to copy a template open Property Management / Email & Printouts and follow the steps below.
Select the template you want to copy and click on Edit Template button.
Then, click on Source Code button to view HTML code.
Use CTRL+A (cmd+A on Mac) to select all code, then copy it using CTRL+C (cmd+C on Mac).
Close the template to come back to Email & Printouts.
Create a new template and click on Edit Template button.
Open the Source Code again and paste the code you copied from the other template.
Click on OK button to close Source Code window, then save the template.
You can do it as many times as you want other templates copies.