File types are the files that may be requested to the authors during submission and/or revision. Setting up file types has two steps:
The first step is the file type configuration, where file types are listed, and may be created, updated, or deleted:
Clicking on “Edit file type” will get you to the file type configuration, where the following fields may be edited:
The second step is the article type configuration, where specific file types may be requested to the author at submission or revision, for a specific article type.
Depending on the article type, you may want to require specific files. For example, a cover letter from the authors may not be requested for a preface article.
In a given article type, depending on the first submission or a revised submission, you may want to require specific files. For example, a first submission will never require a reply to the referee, while a revised version will often need a reply to the referee.
Thus, for any given article type, this behavior is defined in the configuration: