The XL2720 at its lowest height, then again, at its highest point.
Swivel to the right and left by 45°.
To rotate by 90° you need to have the display at its highest point. This mode is great for productivity.
On the left side there are two conveniently placed USB ports and a headset port.
The IO ports: S-Switch miniUSB port, Displayport, D-SUB (VGA), DVID, 2x HDMI, USB upstream (Type B), 1x USB down.