In person signing allows you to select a host for another recipient to sign using their device. This way if both recipients are in the same space, they won’t both need to access a device, as one recipient can host a session for the others.
From here you can now finish the process for sending the document for e-signing. Once the host receives the document, they will be able to sign and fill their relevant fields, and then host the session for any users that will be using their device.