This document provides an overview of the MarcEdit software for editing MARC records. It demonstrates how MarcEdit allows users to preview and edit MARC records outside of an integrated library system. Key features include breaking MARC files into editable .mrk files, editing records individually or in batches, creating MARC records from Excel spreadsheets, and compiling edited records back into MARC format. The document provides step-by-step examples of using MarcEdit to extract records, map spreadsheet fields to MARC tags, and view results.