Hi,
sorry for the delay....i didn´t check the messages yesterday
So about the routing......while in the performance mode, press the effect button (EDIT section of the JUNO-G)......the routing screen will appear.
In this screen you can see how the part is routed through the effects (Reverb, Chorus, MFX, Master)....and of course you can edit each of these effects.
On the left you can see which part of the performance you are currently editing and under the information about the part, there is the output......here you can set the patch to be sent to the output A, B, 1, 2, or through the MFX .......and then decide which MFX (1, 2 or 3)
Make sure that the MFXs you wish to use are switched on (these are ON by default)....you can switch them ON/OFF in the same screen.....in the right bottom corner of the screen.....SWITCH button.
I hope this was useful....have a nice day:)