I have got it now....
I have put in A+B / bypass mode, with the effects in the loop A.
Like this volume A will control the relative volume of the effects and volume B will control the relative volume of the dry signal. So, it will blend one signal with another. This is working with the instrument plugged in to the input and the output going to the amp....so I can now do what I want and toggle between the dry signal and a dry signal blended with effects in a loop.
I was confused in thinking that pedal had two loops which could then each be independently blended with the dry signal.
Athiest, Anarchist, Ambivilant.