Some TouchSmarts include an additional video slot to which a second monitor can be connected. Depending on the age of the device, the TouchSmart could come equipped with either a high-definition multimedia interface, video graphics array, digital video interface or separate video socket. You can connect an additional monitor to duplicate the screen onto a larger display – thereby getting a better view of your workspace – or extend the screen across both monitors, allowing you to work on multiple projects simultaneously. Writer Bio

How to Hook Up a Second Monitor to a HP TouchSmart Computer - 5