The creator of the document can place the signature field in it while sending it out for signature but the signer won't have option to make changes in it.
If you want to send the document through API, here is the link:
Also, if you have a developer account, you can access the sample codes by logging into EchoSign account, going to Account tab->EchoSign API.
I am having the same query as adobat has asked. Please answer it appropriately.
A user is able to place signature field any where on the current document. Like drag and drop signature field on the document anywhere required.
any possible solution for achieving this?
If you want to provide echosign capability to your customers, your solution may be more of a partner integration. I would recomend contact Echosign support or sales asking about partnering.
To provide drag and drop capability you need to use the send document interactive method if using the API.
This will take senders to the send page where they are given the option to author a document.