Step 4.2: Edit a format
You can edit, delete, or add files to this "pdf" format of your submission
The main file in the format is indicated by an arrow. If there are more than one files, you can make another file be the "main" file, click on the box in the first column. To delete a file, click on the box in the last column; the main file cannot be deleted.
You can edit the extra format information; and you can add a new file to the format by filling out the "upload" or "grab" window, and then click on the "Add New File" button.