> For the complete documentation index, see [llms.txt](https://docs.civictheme.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.civictheme.io/development/drupal-theme/header.md).
# Header
The Header setting allows you to select the Theme and Logo type for the Header.\ 
### Theme
The Header can be shown in Light or Dark theme.
### Logo type
Depending on the space within your site's Header, you can select how the Logo (with one or two images) is shown. The space could be limited due to a high number of Primary Navigation links that sit inline with the logo.
The following table outlines the Logo type using example logos:
| **Logo type** | **Final output (desktop)** | **Final output (mobile)** |
| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Default |  |  |
| Stacked |  |  |
| Inline |  |  |
| Inline stacked |  |  |
As you can see, only "Inline stacked" has a different behaviour on desktop and mobile.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://docs.civictheme.io/development/drupal-theme/header.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.