# Undo data sheet edits

Occasionally, cell values are accidentally deleted or rows/columns added in unintended places but PRIMER 7 (unlike PRIMER 6) is able easily to back-track on such changes. There is a repeated **Edit>Undo** operation for all row and column manipulations on the **Edit** menu (between the **Cut** and **Sort** items). The **Undo** extends to any typing directly into cells of the data sheet or to copying and pasting rows/columns into it, whether from the same sheet or externally, from the clipboard.

[![ScreenshotPage25b.png](https://learninghub.primer-e.com/uploads/images/gallery/2024-05/scaled-1680-/screenshotpage25b.png)](https://learninghub.primer-e.com/uploads/images/gallery/2024-05/screenshotpage25b.png)