Open your TV Box's On-Screen Guide:
- XR2 Remote: Press the xfinity button. The xfinity button is the rectangular button in the fifth row down on the remote.
- Universal Remote: Press the Menu button twice on the Universal Remote. The Menu button is a red oval button located in the center of the remote. The arrow buttons are arranged in an oval layout above the ridge of the remote. The oval button in the middle of this cluster is the Menu button.
For both remotes, use the arrow buttons to go to Setup in the guide. Press the OK/Select button.
Use the arrow buttons to go to Audio Setup. Press OK/Select.
Press the down arrow once to highlight Descriptive Video Service, then use the right/left arrows to turn it on/off.

Note: The Default Audio Track option is set to Channel Default, unless you've already changed it. When you turn Video Description on, the Default Audio Track changes to Espanol. This is because Video Description is on the Secondary Audio Programming (SAP) channel, which is often used for a Spanish language track.
Press the Exit button on the remote (above the Volume button on the Universal Remote, and next to the xfinity button on the XR2 Remote) to go back to programming.