Click Edit on an Excel or Word file, or create one with New → Spreadsheet / Document. The editors work like the office tools you know: menus, a toolbar, keyboard shortcuts, live formulas, formats, sheets, styles, tables and images. Only one person edits a file at a time — others open it read-only and see who is editing. Your work is kept as a draft every 30 seconds and every save is a new version of the file.