[tsac]

You did not indicate how your trying to do a screen shot so here is the method.
The browser photos are not really photos like ones you take with the camera. some applications present the photo properly some do not.

To take a screen shot, navigate to the desired screen and press both the up (+) and down (-) volume keys simultaneously (located on the right hand side of smartphone). If done correctly, a snapshot sound will be heard.

After successfully taking a screen shot, if connecting the BlackBerry 10 smartphone to a computer via USB to retrieve the file, the screen shot will be located within the Camera folder.