Is it possible to add custom htmlHTML and cssCSS in views header and footer using the administrative UI.? I am trying to add a header to my view but that is not giving me any option through which I can add htmlHTML and cssCSS like the options which are given to us when we add fields in views. I have tried adding a header using Global Textarea but in this, we can only write htmlHTML not cssCSS. Kindly tell how can we add htmlHTML and cssCSS both to the header.