---
schema_version: "1"
id: f00ef41289959affdbacfacdeaa5388cb8af94c7f4a1f00dfd9b3ca10df56b6f
title: Apply Header Transformers in Marketing Cloud Intelligence
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/dato_data_streams_tc_transformers_header_apply.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.dato_data_streams_tc_transformers_header_apply.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 65bd39bc9b9d0f8451085809d3fb01673dad3e732d28242edb17e6c0431c311b
description: If you want to customize the header structure when headers aren’t available or span multiple rows, you can use a header transformer. For example, if a file has a two-line header that must be combined into one row.
products:
  - Marketing
  - Marketing Cloud Intelligence
release: "264"
---
# Apply Header Transformers in Marketing Cloud Intelligence

If you want to customize the header structure when headers aren’t available or span multiple rows, you can use a header transformer. For example, if a file has a two-line header that must be combined into one row.

### Required Editions

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1. From the **Connect & Mix** tab, select **Data Streams**, and then **Data Streams List**.
2. Create a data stream, or edit an existing one.
3. In the **Preview Source** screen, click **Edit Transformers**. File transformers are added by default.
4. In the **Transformers in Use** section, next to the Header transformer, click **Edit**.
5. If your file doesn’t have headlines, and you don’t want the platform to choose the first row automatically in the mapping process, select the **File has no headers** checkbox.
6. When the dimension’s value is in a merged cell above the measurements, select the **Merge multiline headers** checkbox. Typically, this scenario happens with conversion tags.
    
    The Merge Multiline Headers process looks like:
    
    ![Merge multiline headers](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-mktg-salesforce_datorama-264-0-0-production-enus/d38a342d-dd4a-4af8-8343-f372280a75dd/salesforce_datorama/images/data/data_streams_transf_merge.png)
    
    In this example, you also must apply the Transpose Transformer.
7. If you select the **Merge multiline headers** checkbox, and you want the platform to use the bottom header when the top header column is empty, you can select the **Top multiline header columns aren’t empty** checkbox.
8. Click **Done**.