Hi pizza88,

You will be able to do a vertical extension on ‘Dell U2711 Flat Panel Monitor’. You will have to gently push or pull by holding the monitor sides. Please refer to the link below to see the picture.

http://support.dell.com/support/edocs/monitors/U2711b/en/ug/operate.htm#Vertical Extension

Also, you can refer to the videos below to see the customer pushing or pulling by holding the monitor sides to do the height adjustment.

http://bit.ly/Q0rw9x

http://bit.ly/OVkTEp

Please reply for any queries.