> For the complete documentation index, see [llms.txt](https://docs.qyrus.com/data-testing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.qyrus.com/data-testing/functions-and-transformations/index/using-functions.md).

# Using Functions

Apply saved functions to your jobs for data transformation.

## Step 1: Reopen Job in Edit Mode

* Navigate to **Saved Jobs**.
* Click **Edit** on the desired job.

![Select Job](/files/3mj0JahNnQJhmJP3l3Pb)

## Step 2: Configure Source Connection

* Verify the connection configurations.
* Click **Next** once confirmed.

![Configure Connection](/files/r5FbD1dVlQqsM49MQdRP)

## Step 3: Fetch Functions

* Navigate to the **Column Code Transformation** section.
* Click **Fetch Functions** to load all saved functions.
* Select the desired function from the list.

![Fetch Functions](/files/lS6f6raq0pKQIMN2xrpi)

## Step 4: Add the Function

* Choose the function from the dropdown.
* Click **Add** to apply the function.
* **Modify:** Click on the function name to edit.
* **Remove:** Click the red delete button to remove.

![Add Function](/files/WAVyetl5IAHdwK0j91iH)

## Step 5: Finalize the Job

* Review all added functions.
* Click **Save** to store the updated job.
* Run the job from **Saved Jobs**. Transformations are applied during execution.

![Finalize Job](/files/A3IrVigati8MYKdhvS2d)

> **Navigation:** [Functions Guide](/data-testing/functions-and-transformations/index.md)