Hide Navigation Bar in portafolio Pages.

Hello everyone. I need some help. Is there any code I  can inject so I can hide the navigation header in the portfolio section?

Thank you!

The default way of doing this isn't available for portfolio pages (no, I don't know why!). But you can use this code snippet in the pages settings header code injection:

<style>
.header .header-announcement-bar-wrapper {
    display: none;
  }
</style>