> For the complete documentation index, see [llms.txt](https://guides.mangoapps.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.mangoapps.com/admin-guide/branding/custom.md).
# Custom
### Overview
Network administrators can customize content using CSS and JavaScript to tailor the MangoApps experience for users based on different departments, business units, or specific conditions. Regularly review and update CSS and JavaScript customizations to ensure alignment with company branding and evolving user needs.
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### Custom CSS
Network admins can customize the entire MangoApps experience for users with global CSS.
#### Custom Full Site CSS
Customize the full portal by pasting custom CSS in the text box. This is the default branding that will be used on all pages of the web portal. This branding will also be used on all non-logged pages (such as the login page, reset password page).
{% hint style="warning" %}
Any images you refer to in the custom CSS should be added with its 'https' URL to avoid some browsers from showing a security warning when you visit this portal.
{% endhint %}
#### Custom Header HTML & CSS
Customize the header by pasting custom HTML and CSS within the text box. Any images you refer to in the custom HTML/CSS should be with 'https' URL to avoid some browsers from showing a security warning when you visit this portal. For additional security reasons no script tags allowed.
Toggling the **User Can Hide** to **OFF** removes the end user ability to choose a theme for their portal and overrides it with the CSS settings defined here.
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### Custom JavaScript
Network admins can choose to execute a JavaScript code snippet each time after a page is loaded. Code snippets to track page views or add custom functions that can be added to your domain for extra functionality.
