If you require an image or a document to be attached to the signature request you sent to your recipients, you can now add an "image" and "attachment" fields on your document.
Note: The image and attachment fields are special features available under the Pro plan subscription.
Image Field
Click on the "manage field" icon at the top left corner of your editor page to see the "image" field option. You can also select the type of image you prefer from the right side panel.
You can then view or download the image attached by your recipient from the finalized copy that you will receive.
Attachment Field
The "attachment field" can also be selected from the "manage field" icon. You can also select your preferred document type from the right side panel.
Once the document is finalized, you can download the document the recipient attached to the field.
Here is also a useful YouTube video on how to add the Image and Attachment fields.