:) The left sided bar – toolbars made of folders with thumbnails: top and middle – with small icons, bottom (firefoxes) – with big icons. The right column – is windows’s regular taskbar panel.
To make two columns –
you should have at least one user’s toolbar + regular windows taskbar panel
in unlocked mode try to drag any of them to the right side so that the other stays left, and it makes the layout to change its mode to two columns