What appears to the left of its entry in the current list in the source manager when a source is cited in a document?

When a source is cited in a document, a small icon or symbol typically appears to the left of its entry in the source manager. This icon often indicates the type of source (e.g., book, article, website) and may show the citation status or whether it has been used in the document. This visual cue helps users quickly identify and manage their sources within the source manager.