To allow users to upload thumbnails from the front-end, the Plugin Contact Form 7 needs to be installed.
- Create a new Contact Form with the following tag:
<p>File thumbnail<br />
- In Embeddable Forms settings, disable “Use advanced Drag & Drop Uploader” and choose the created Contact Form 7 Form from step 1.
- Save the settings. User can now choose a seperate thumbnail file before uploading