Numbered headers in jupyter notebooks

Question

I\'d like to change the way Jupyter displays the so called heading cells. By default, heading levels are only differentiated through a different font size. I\'d like j

Answer 1

There is on tiny step I may overlooked:

conda> jupyter contrib nbextension install --user      # to activate js

perfectly explained in: http://jupyter-contrib-nbextensions.readthedocs.io/en/latest/