layout
$mod+e splith/splitv (with $mod+h, $mod+v)
$mod+s stacking
$mod+w tabbed
workspace
$mod+num go to workspace
$mod+Shift+num move app to workspace
app
$mod+d open app
$mod+Shift+q close app
$mod+f full screen
other
$mod+Shift+r restart i3
$mod+Shift+e exit i3