Depending on the version of Windows installed and the model of your system this option may differ slightly. Generally the camera can be swapped after by doing the following:

1. Open the Camera app.
2. Swipe in from the bottom edge to see the app commands.
   (If you're using a mouse, right-click within the app.)
3. Tap or click the Change camera button.

For additional Dell Webcam troubleshooting guides and information check out the links below:

Using and Troubleshooting the Dell Webcam and Dell Webcam Central Software

http://www.dell.com/support/troubleshooting/us/en/04/KCS/KcsArticles/ArticleView?docid=266612

Microsoft - Camera app and webcams help

http://windows.microsoft.com/en-us/windows-8/camera-app-faq

Thanks,

how can i switch from front camera to rear camera in dell latitude 3189? i am having issues with operating the camera attached to the keyboard.

@Leksam​ me too have you found out how to change it ?