Opening a specific record template as pdf on button click via openUrl

If I use a function to email a record template as a pdf I can choose a specific record template ("testRNtemplate") from several I have created using the syntax:

sendmail

[

from :zoho.adminuserid

to :zoho.adminuserid

subject :"pdf is attached"

message :"pdf is attached"

Attachments :template:testRNtemplate as pdf

]

Now if I want to download the pdf on button click this sort of function seems to work but I cannot figure out how to specify a particular template. It seems to always download the default template.

void defaultFunction(Sample_Requests dummy)

{

openUrl("https://app.zohocreator.com/unsername/appname/record-pdf/Sample_Requests_Report/" + dummy.ID,"new window");

}

Is there a way to specify which template gets downloaded?