Note, if you are on a Mac, substitute command for control. Don't type the + (it means press both keys at once).

• Shift + Enter run selected cells

• Ctrl + S save and checkpoint

• Ctrl + Shift + S save as

• Ctrl + B toggles hide/show left sidebar

• Scroll up with the up arrow

• Scroll down with the down arrow

• A insert a new cell above the active cell

• B insert a new cell below the active cell

• M make the active cell a Markdown cell

• Y make the active cell a code cell

• Shift + Up Arrow select the current cell and the cell above

• Shift + Down Arrow select the current cell and the cell below

• X cut the selected cell or cells

• C copy the selected cell or cells

• V paste the cell(s) which were copied or cut most recently

• Shift + M merge multiple selected cells into one cell

• DD (D twice) delete the active cell

• Z undo most recent command mode action

• Esc takes you into command mode

• Tab code completion (or indent if at start of line)

• Shift + Tab tooltip help

• Ctrl + Shift + - split the active cell at the cursor

The usual commands for code editors:

• Ctrl + ] indent

• Ctrl + [ dedent

• Ctrl + A select all

• Ctrl + Z undo