If you select the I will send the document manually option, you will have to manually select form entries received and send the document to acquire digital signatures.
To do this,
After setting up the Zoho Sign integration, go to the All Entries section of your form.
Select the entries to which you wish to send the document and click Send for Sign.
If you have your form's iframe or JS code snippet embedded in your website and have chosen to redirect the respondent to a Zoho Sign document, you are required to add the domains of the parent website (and the parent iframe(s), if applicable) in order to redirect to the document successfully.
To do so,
Click + Add Domain(s).
In the pop-up, enter the domain of the parent website or the iframe URL and click Add.