Sending mail merge templates in Zoho CRM

Sending mail merge templates in Zoho CRM

I think I know the answer already, but want to double check...

Zoho Sign supports a drop down merge field, for example:
{{Dropdown:Recipient1:(options="D1,D2,D3")}}

But if sending FROM CRM using the Zoho Sign Extension, that field would not be supported, is this correct?