Web interface buttons

Hello -- can anyone explain what the highlighted b**tons are used for in the IE ActiveX control? The ones in the right seem to adjust the focal distance (RLC-411WS), but haven't figured out what the ones on the left do (highlighted in red)... thanks in advance for any information!
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On the left:
"-": Focus Backwards
"+": Focus Forwards

On the right:
"-": Zoom Out
"+": Zoom In

When you zoom the camera, usually it will focus automatically. But in some special environments, for example, moving objects, or very white viewing site( above 70%), it is hard to get focus. So you may focus it manually by the b**tons on the left.

Where are the b**tons on the left? I'm having zero luck with the auto-focus so I thought I'd try manual focus if possible. 411s by the way.

The b**tons on the left allow you to adjust the focal length manually. It is normally used in special environments. For example, moving objects, or very white viewing site( above 70%), and it would be hard to get focus. In this case you may focus it manually by the b**tons on the left. If you constantly can't get auto-focus, please try switching your camera to a new angle and try again. For the details of auto-focus, please refer to our FAQ：Solutions for camera failing to focus.