Help required.

I need advice regarding the operation of the Canon EOS 630 SLR.

Looking at the camera from the rear, to the left of the viewfinder there is a small round knob, the main control switch. If you rotate it clockwise, you can access the "scene" modes. If you rotate it anticlockwise, the first setting is designated "A" and acesses a variety of "manual" modes.

If you rotate it past the "A", you get a setting designated ((.)) (as far as I can reproduce it here).

What is this and what does it do?

There appears to be no reference to it in the handbook, and it seems to simply reproduce the "A" setting, except that you get the "beeper" noises with it, which you don't in the "A" setting.

Is that all it does, or what?

Please respond.