I'm working with some logic that is a bit unconventional. I have a form that an approver needs to sign off on, however if they were to reject the form then a signature is not required. I currently have the signature as required but due to the requirement of not needing the signature if rejected the required mark will need to be dropped. What I'm looking for is if the signature is filled then the 'Approve' button would need to be enabled. I've seen other post that use fields to enable/disable the submit buttons however I'm not sure what to target when the signature is filled out.