Idea Portal sub-title Links on a form should open in a new tab

Thank you for reaching out. You can use a custom header to accomplish this today. Go to Branding > Custom in your portal settings and add custom header html. This header will replace the standard portal header at the top of every page in the portal.

When you include links within the custom header, use a blank target in order to open in a new tab: <a href="https://example.com" target="_blank">Example</a>