Could someone please shed some light oh how to use the Bar Settings to Fade (per bar) and/or Louder (per bar)?

I would like to fade real tracks in and out without using DAW.

Also the Bar Settings Change by ? I use a minus number for softer and a volume number for louder. Cannot find the information on use.

Thank you,

Gary Hart

p.s.
I finaly make the jump to audiophile and LOVE it.
Band in a Box is WONDERFUL!