Click on TICKETS in the main menu on the left.

A sub-button TEMPLATES will now appear under that button click on it now.

Choose the template you want to edit and click on OPEN.

Click on the + icon in the upper right corner of the editor menu.

A window will open with TICKET VALUES.

Click on the value you want to add and place it in the desired location.

Then click on the orange SAVE button in the upper right corner to save your changes.