# Overview

The records applied time-series matrix transformation is represented as nested columns in the sheet as shown below.

![](https://3931893316-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fda6dgS8tzUOtZkkZ6URV%2Fuploads%2Fgit-blob-27f49d0d10b398ece58654a667c0c0f6fc7c4850%2Ffig052%20\(1\).png?alt=media)

* **\[A] Matrix Column Header** - Header of the combined column that will be the root for the matrix-transformed data. Settings for the matrix column can be changed from the menu in this header.
* **\[B] Series Value Column Header** - Column header that displays fields of the related list record which has sepcific time-series value. It is displayed repeatedly for the number of period specified in the matrix column settings.
* **\[C] Child Column Header** - Column header nested inside of the matrix column, which displays a field value of the related list record . It is repeated as many times as the number of time series values.

{% hint style="info" %}
If only one child column is selected in the matrix column, the child column header is omitted and the matrix column will be two-level nested header structure with only matrix column header and series value column header.
{% endhint %}