You must own the copyright or have the necessary rights for any content you upload.
Paper without a thumbnail image
Paper with a thumbnail image
For sharing across networks please note:
Changes will usually be reflected with the next automatic update of your paper
Some services can take up to 7 days before presenting your new image. This is due to the expiration set on their image cache and we unfortunately can't influence this.
If you paste your URL into a status update field, depending on the social platform you are on, you may need to toggle between the gray standard P and your cover image. Once you select the cover image and save, it will be displayed.
If you are sharing your paper via the standard share icons found under the SHARE tab, (such as Twitter, G+, FB) your thumbnail will be automatically identified and displayed.