...
{#set($ticketUri = "#joinParts($document.order.ticketUris)")}
{#end}
In the section of "PRINT_AT_HOME" and "ELECTRONIC", add the following command:
{#if($stxHelper.getProperty($document, "showTicketUris", false, "", "") == "true")#if($document.order.ticketUris.size() == 1)} or download your tickets directly{#end#end}
...
The text "or download your tickets directly" is the text that will be displayed in the confirmation email. The link "your tickets" must take the value "https://$ticketuri/".
The link is then displayed in the confirmation email, if the shipment mode of order is either "PRINT_AT_HOME" or "ELECTRONIC" and there are some tickets that can be downloaded:
...