I thought it would show up directly in the html source code within the
UI, once I have completed my message set up and saved everything, could
you please reconfirm, thanks again.
@mmbb110- See the below links -
https://experienceleague.adobe.com/docs/campaign-standard/using/working-with-apis/managing-workflows/triggering-a-signal-activity.html?lang=en#working-with-apishttps://experienceleague.adobe.com/docs/campaign-standard-learn/tutorials/managing-processes-and-data/execution-activities/external-signal-activity.html?lang=en#managing-processes-and-dataHope
this helps!