When you are looking to customize your portal completely, you may not be able to make do with just adding CSS. So we've added some serious customization capabilities that allow you to rewrite the HTML of all the pages in your portal.
What can you do with complete portal customization?
A quick guide to customizing layouts in Freshservice
Click on Admin > Service Desk Rebranding > Customize Portal.
Click on the Layout & Pages tab.
Under Portal Layout, customize the header, footer, and overall layouts.
Under Page Layout, customize the design of the specific page.
Make sure you save your edits by clicking on Save.
Publish your changes by clicking Save and Publish.