Digital signature during free trial

Hello,

I'm currently trying out Adobe Sign through the free trial, and I was looking for the digital signature option for documents, without finding it, even when creating a model; I can't find it as it's detailed in the page: https://helpx.adobe.com/sign/using/digital-signatures.html

Is that option disabled for free trial?

If so, and I can't try it out, can anybody confirm if the option is at least available with the single user AdobeSign license?

Best Regards