Hide Input All
This extension allows hiding all codecells of a notebook. This can be achieved by clicking on the button toolbar:
Typically, all codecells are shown with their corresponding output:
Clicking on the "Toggle codecell display" toolbar button hides all codecells:
The codecell hiding state is stored in the metadata IPython.notebook.metadata.hide_input.
If it is set to true, all codecells will be hidden on reload.
Follow the installation instructions appropriate to your IPython version as explained on the main wiki home pages: