Only use signature for replying not forwarding

Only use signature for replying not forwarding

I was wondering if there was a way to only have my signature appear on reply emails rather than both replies and forwarders by default.

I saw the below question and answer but then when I had a look it doesn't actually include the variable "$EmailSignature" so therefore it is just a default as soon as we add a signature to the personalize section.
https://pitstop.manageengine.com/portal/en/community/topic/servicedesk-plus-email-signatures

Thanks