Exposure Setting 600d

Sorry for the simple question, but i'm confused, On my 600d set in M mode the only change i can make to the exposure is a bracketed exposure where 3 lines appear under the compensation bar, I cant seem to move it as one bar for one photo?
When i go into the menu screen and exp comp/AEB the +/- icon isnt highlighted as it is in Av mode where i can change it via the left and right buttons, and on the quick menu via the wheel.

Is there a setting i cant find to change it from AEB to single in M mode? or am i trying to do something i cant do?

Sorry if it seems confusing im struggling how to put it into words

Are you basically trying to set some exposure compensation while in "M" (manual)? If that is what you are trying to do, I don't think it is possible. Just simply dial in what you desire by setting aperture or shutter speed.

There was a previous thread on this topic. The bottom line is that "exposure compensation" as used by Canon means adjusting the auto-exposure calculated by the camera by a set amount +/-. Since M mode, by definition, has no auto-exposure calculated by the camera, the exposure compensation setting is not used.

You set the exposure in M mode. If you want +1 stop over what the meter says, just open the lens up one stop, slow the shutter by one stop, do each by 1/2 stop, or whatever combination you choose.

When you in M mode have set the exposure such that the meter scale at the bottom of the viewfinder (which in AE modes is a compensation scale, but in M mode a light metering scale) is at the center, you've set exposure the same way as the camera would have done, had you used the P mode or whatever.

When you change a setting so the meter needle moves away from the center, you are doing the same thing as exposure compensation would have done in an automatic mode.