# Add Column

In this document, you will explore how to add a column in Astera Dataprep.

1. To add a column, click *Layout* in the toolbar and select *Add Column.*

<figure><img src="/files/vLOP0tYEV1KIsQuMCdUo" alt=""><figcaption></figcaption></figure>

2. Once done, the *Recipe Configuration – Add Column* panel will open.

<img src="/files/Ivi6nJE3KnwKko8DGMJg" alt="" width="383">

3. In this panel, you can specify the *Name, Type, Header, Position,* and *Index.*

![](/files/8PsutCZ15GzgFNywdgT5)

* **Name:** The name of the new column.
* **Type:** The datatype of the new column to be added.
* **Header:** Specifies the column name when writing to a file.
* **Position:** Consists of various options to help specify where the new column should be added.
  * **Index:** Adds the column at the specified Index position.
  * **Start:** Adds a column to the start of the dataset.
  * **End:** Adds a column to the end of the dataset.
  * **Move Before:** Adds a column before a specified column in the dataset. Once selected, you must specify the column through the Reference drop-down.
  * **Move After:** Adds a column after a specified column in the dataset. Once selected, you must specify the column through the Reference drop-down.

<img src="/files/7T86tRQsShXkEMAIPUUp" alt="" width="372">

* **Value:** You can specify the expression that you want to be applied on the objects for the new column.
  * This can be done directly in the expression box, or you can open the *Expression Builder* by clicking ![](/files/c7uvYM2mPruaOhq7IJyR) next to the expression box.
  * Here, we have simply added 100 to our existing ‘*Freight*’ value.

![](/files/0wdfLXYWAVlpZOwj8Qoz)

4. Now, let’s select *Apply* ![](/files/10KTRq7DN4pST0pzbGYQ) to add this new column to our dataset.
5. Once done, you can see that the new column with your specified configurations has been added to the grid.

![](/files/PFvFYl5D0p9QmQAfhI8H)


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