# Style sheets As mentioned in section 4.1.14 Stylesheets on page 36, the Chamilo styles can be updated through a simple copy of any of the existing styles located in *chamilo/main/css/*. You'll find a series of styles directories in this directory, e.g. *chamilo\_green*, which can be copied, renamed and modified at wish. To test them, just go to the *Stylesheets* section of your portal configuration page, upload your style as a .zip file and select the style uploaded, then save. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.chamilo.org/1.11.x/admin-guide/global_features/style_sheets.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.