JupyterLab shortcut

Command mode

operation	shortcut key
Run selected cell & move to cell below	Shift-Enter
Run selected cell	Ctrl-Enter (for Mac user: command-Enter)
Show/hide row numbers in all cells	Shift-L
Switching input modes	m: Switch to Markdown y: Switch to Code r: Switch to Raw
Insert a new cell above the active cell	a
Insert a new cell below the active cell	b
scroll notebook up	Shift-Space
scroll notebook down	Space
delete selected cells	dd
undo cell deletion	z

Edit mode

Operation	shortcut key
Run selected cell & move to cell below	Shift-Enter
Run selected cell	Ctrl-Enter (for Mac user: command-Enter)
Indent	Ctrl-]  (for Mac user: command-] )
Dedent	Ctrl-[  (for Mac user: command-[ )
code completion or indent	tab
comment	Ctrl-/  (for Mac user: command-/ )