I think the signature tool is the best way to have someone draw a diagram in my survey. Does anyone know how to install the signature function in a survey form?

Hi JohnL ,
I believe the Signature question type is an add-on feature. If it is available to your account, it should appear under the Specialty Questions Grouping when you add a question or change the question type. If you don't see it there in your account, it's either not activated by your brand admin (if you're part of a organizational account) or it's not part of your license at all. Reach out to your brand admin to enable this feature or get a price quote from Qualtrics sales.

Thanks for your help Matthew, I will follow this up with admin at Deakin Uni. The screen capture you added really helps. John