Ok thank you very much sir 
ps: i understood why i can’t ajust envelopes per-layer…you need to click on ‘PAD’ button just on the right of ‘ABS’ button and set it to ‘SEL’.
Ok thank you very much sir
ps: i understood why i can’t ajust envelopes per-layer…you need to click on ‘PAD’ button just on the right of ‘ABS’ button and set it to ‘SEL’.