> ## Documentation Index
> Fetch the complete documentation index at: https://docs.askgrapple.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Transform

> Transform mapped data

Use `/transform` to reshape nested or array data into new fields.

## How to use

1. Type `/transform` and press **Space**.
2. Describe the transformation — for example, *"build a payment summary per contact"*.
3. Grapple generates the transform and may add multiple new fields.

Unlike `/formula` and `/rollup`, transforms can create more than one column when the reshaped data has multiple outputs.

## When to use

Use transforms when you need to restructure nested arrays or related data — not just compute a single value per row.