Hi @tonidebeer,

I hope you are well today and thank you for your question.

The 404 page is a dynamic page and not static page so you won’t find it in the site admin area.

You can try styling it using Yellow Pencil editor as described in the below page.

https://support.shufflehound.com/how-to-change-almost-any-element/

Best regards,
Shufflehound team