Web interface buttons

Hello -- can anyone explain what the highlighted buttons 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 buttons on the left.

Where are the buttons 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 buttons 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 buttons 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.