i hope someone can help me translate this,since my pinyin is far too bad to type a passage........
first u can assign up to 16 buss in your option --audio default comes in 2
that means u can use up to 16 diff effects at the aux
auxilary means u can share the same effects for each audio track with diff level and it hangs at the end of all audio effects (which like reverd and delay should not be hang b4 distortion or most others effects)
at control panel the send is the level of gain input to your effect
return is how much effect coming back to the master
at audio track ex:A1 it's on when the green little light is being clicked on
the send level is how much effect u gives to your track
so such as ... u can apply a diff type of reverd to your drum track at A1
and assign another to vocals on A2...
or maybe a delay for whatever at A3
u can also add an aux envelope(drawing line) to your audio track...so u can have diff level of effects in one single track
hope it helps and welcome for further question