Jupyter Notebook has two primary modes: command mode and edit mode.

Command mode allows you to navigate and manipulate cells at a higher level.

Below are some useful keyboard shortcuts in command mode:

• A: Insert a new cell above the current cell
• B: Insert a new cell below the current cell
• D, D: Delete the current cell
• Z: Undo the last cell operation
• Shift + Enter: Run the current cell and move to the next one
• Y: Change the current cell to a code cell
• M: Change the current cell to a markdown cell
• S: Save the notebook

Edit mode allows you to edit a cell when you click inside of it.

Below are useful keyboard shortcuts in edit mode:

• Ctrl + Enter: Run the current cell
• Esc: Exit edit mode and enter command mode
• Shift + Tab: Show the docstring of the current object
• Tab: Auto-complete code or show available options
• Ctrl + /: Comment or uncomment a line of code