Header

@Anvi15 Put this JavaScript in the question where you want the header to be hidden

Qualtrics.SurveyEngine.addOnload(function()
{
    jQuery("#Header").hide();
});

Let me know if it work

just hide the class you used in the header.

Example:

jQuery(‘.Class’).css(‘display’,’none’)

.hide() may or may not work with some browsers but the above works for most of them! :)