---
sourceDocument: Australia ServiceNow AI Platform user interface
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/platform-user-interface

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia ServiceNow AI Platform user interface

ft:clusterId :

    - platux

bundleId :

    - platux

workflow :

    - Platform


---

# Style sheets

# Style sheets {#ariaid-title1}

* Release version: Australia
* 
* Updated March 12, 2026
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Styles sheets are standard Cascading Style Sheets (CSS) that define the look and feel of
all elements within the interface.

Cascading Style Sheets (CSS) can either be internal (stored in the database) or external
(hosted on the server), based on organizational needs. To define an internal style sheet, use
standard CSS in the style field. Using external CSS allows the Content Management System to use
the same CSS as a corporate website or other online resource.

Use an external style sheet by defining a URL that points to the .cssx file. If you upload a
.cssx file to the platform, you can reference the .cssx file using a URL.

Content pages do not reference style sheets directly. To invoke a style sheet, you assign the
style sheet to a Theme using the related list on the Theme form.
**Related tasks**   

* [Customize a design theme](https://servicenow-prod.fluidtopics.net/RjJcQFNn1pQN8KzioA3j3A "A theme is a collection of one or more style sheets (CSS files) that define a consistent look for a set of pages.")