OK, here how you do it. First if you want to route multiple channel to the same effect you need to set up a FX Channel. If you go to project tab9click you should be able to create a FX track. Once you create the FX you got to choose what type of FX it going to be i.e.----reverb, delay, or phaser. Then you must select mono or sterweo. You want it to be stereo. This should set up the FX channel. Now you will ned to go to what ever channel you want and send the signal to that FX. You then can send how much of the signal to it from 0 to 100 percent, but make sure the button for on is lite on the send effect.
You set up a bus or group channel the same as FX. It's located on the same menu. YOu selected rather you want it to be mono or stereo. I hope I answer your question.