The Maths will be enough to get you started with attenuators. Channel 2 and 3 are dedicated to this. But you may find you'd want something like a Befaco Attenuverter. It also includes an offset dial. The offset allows you to center your CV around a point other than zero. Just imagine taking an LFO that goes from -5 to +5v and then attenuating it to -2 to +2V. Then using the offset knob to change the range from +1 to +5.