gravity forms file upload field

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  1. If your users uploading images are logged in, you can try this with Gravity View (its a premium plugin). Once the user uploads the image they will be able to see or edit contents of the form.

  2. If users uploading images are not logged in: Here is a guide that helps you this might be able to help you.
    https://www.puddinq.com/blog/wordpress/gravity-forms-image-upload-preview/