Banner and icon for an in-development Google Sheets Add-On. The Master Spreadsheet Editor will allow a user to make changes to a parent spreadsheet that can then be applied to children, with precise controls over which ranges and sheets are updated, as well as which protections are assigned. These updates are applied to the child sheets without interruption to their users. The tool is best used in environments where frequent changes need to be made to a series of identical sheets. For example, on a data entry team, a team lead may need to frequently update the formulas or information on their team's spreadsheets. Rather than manually copying over changes to each sheet, with the click of a button, the script will run, and all changes will be applied.