Reply to need help with FL arpeggiator

well

FL studio 8

so, I set the arpeggiator on ona a channel at a pattern.
start the song,
but the arpeggiator keeps going on forever !!
how do I define when I want that channel/pattern with the appergiator on to stop playing?

or a fade in/out if possible. or do I need to post production on another soft?

thanks.