# Undo and history - Gridline 1.x documentation

> Every save in the Bulk Editor is kept, with who saved it and what changed, and any of the last 500 can be undone.

> [!NOTE]
> This is part of **Gridline Pro**.

Each time you click **Save changes** in the Bulk Editor, Gridline Pro keeps a record of the save: who made it, when, and the old and new value of every cell it changed. Any of the last 500 saves can be undone.

## Undo the save you just made

After a save, the green notice at the top ends with **Undo**. Click it to put back everything that save changed.

## The history

Click **History** next to the Bulk Editor's title. The window lists saves, newest first, 20 at a time:

- **When** the save was made,
- **By** whom,
- **Changes**: how many cells on how many products, and which fields.

![The history of saves, each with an Undo button](https://storage.extendiment.com/media/301/screenshot-3-b101bf30.png)

Tick **Only my saves** to hide everyone else's. Use **Older** and **Newer** to page through.

Click **Undo** on a save to put its old values back. The grid reloads to show them, and the save is marked **Undone**; a save can be undone once.

## What undo puts back

Undo restores each cell the save changed to the value it had before, **if the cell still holds the value that save gave it**. A cell that was changed again since, in the grid or on the product screen, is left as it is, so undoing an old save never wipes out newer work. The notice says how many changes were put back and how many cells were left alone.

Undo saves through WooCommerce too, with the same checks as any save. An undo isn't a save of its own in the history.

## What isn't in the history

- Changes made outside the Bulk Editor: on the product screen, by an import, or by another plugin.
- Adding and duplicating products. Move unwanted ones to the trash from **Products** instead.
- Saves older than the last 500.

Developers can change how many saves are kept with the `gridline_history_size` filter:

```php
add_filter( 'gridline_history_size', function () {
	return 2000;
} );
```

## While Gridline Pro isn't active

The history stays in your database, and appears in **History** again as soon as Gridline Pro is active, ready to undo.

Source: https://www.extendiment.com/plugins/gridline/docs/1.x/undo-and-history