How do I reset the Jupyter/IPython input prompt numbering?

Question

I just wrote my first extensive Python tutorial using IPython notebooks. All went well, except I did a lot of testing and moving blocks around. How do I reset the In [

Answer 1

You can reset the kernel (shortcut: C-m .) and re-run the whole notebook.

Quitting and reloading doesn't work because the code is not re-evaluated.