> For the complete documentation index, see [llms.txt](https://docs.powerpointgeneratorapi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.powerpointgeneratorapi.com/examples/table/update-a-specific-cells-in-existing-table.md).

# Update a specific cells in existing table

Sometimes, you may need to retain the content of an existing table while modifying specific cells. To achieve this, use the keyword `null` to skip the cells you don't want to change. 

In the example below, we updated the cell value in row 2, column 3 from `70%` to `NA`, and added a new row with data for `FIAT`. All other cells remain unchanged.

Before vs after

<div><figure><img src="/files/4VY7Pz81ZnjIqWwRohmk" alt=""><figcaption></figcaption></figure> <figure><img src="/files/6n4TFR2xNvLAKYApsnWO" alt=""><figcaption></figcaption></figure></div>

Template Presentation

{% file src="/files/r0OFgbqkhyXkgtbjEuAi" %}

JSON Payload

```json
{
    "presentation": {
        "template": "Table-Shape-New-Data.pptx",
        "export_version": "Pptx2013",
        "slides": [
            {
                "type": "slide",
                "slide_index": 0,
                "shapes": [
                    {
                        "name": "Mytable",
                        "data_cells": [
                            [
                                null,
                                null,
                                null,
                                null
                            ],
                            [
                                null,
                                null,
                                "NA",
                                null
                            ],
                            [
                                null,
                                null,
                                null,
                                null
                            ],
                            [
                                null,
                                null,
                                null,
                                null
                            ],
                            [
                                "FIAT",
                                "30%",
                                "40%",
                                "50%"
                            ]
                        ]
                    }
                ]
            }
        ]
    }
}
```