Custom header

Custom header

When clicking a job in our careers jobs listing page, how can I show a header to the job detail page? Right now, there is nothing and I would like to add some branding. example url: https://recruit.zoho.com/ats/Portal.na?digest=4XouQ*4BvXwf119lA*GZhvE.*ost6i0xqnimMHFwEqE-&m=vj&id=187069000000398046&wid=187069000000041027&embedsource= Thanks! Sylvain Audet