Simultaneous collaboration on documents by distributed authors has been supported by numerous synchronous collaborative authoring systems that are widely available. Originally, these tools were found to lack in providing rich enough interaction during authoring. As a result, group awareness in collaborative authoring arose as a very important issue in understanding how to provide comprehensive knowledge about other authors and activities they perform upon the document. To promote effectual authoring of documents simultaneously, group awareness is required to allow authors the best possible understanding of others' work on the document. This paper reports results about document-related awareness elements from an empirical and experimental study of group awareness. Awareness elements reflect fundamental awareness information in supporting group awareness. Such results teach us what sort of document-related awareness should be provided for collaborative authoring.