Which of the following is NOT an imaging warning?

The option indicating "File Size Exceeded" is not an imaging warning because it does not specifically pertain to an issue with how the content is displayed or formatted within an imaging context. Instead, it relates more to the overall data storage or transfer limits that might be imposed by the system or software being used.

Imaging warnings typically focus on issues that affect how an image or document is rendered or viewed, such as problems with character encoding, which can lead to misrepresentation of text, cut-off text where content is truncated, or problems with rich text formatting that can affect the visual fidelity and usability of the document. Each of these imaging warnings points to specific problems that would hinder the proper visual presentation and usability of the content, whereas exceeding file size is a more general data handling concern.