Hi I have Modx 8:
I wanted to say that I am surprised that the latest update 2.5 does not yet have the option to
Element Edit / XA Control / Legato:
The set that has almost every sampler keyboard is "UP Legato" and "Dw Legato"
To enable professional editing
  For example: Editing a Strings library is known to have samples
  glissando UP and glissando Dw, as well as in most brass libraries, guitars and more ..
There is currently only one selection option in Legato and this greatly limits the options
Edit sound libraries perfectly. I would love to expand on the matter if I ask ..
I have to say that I love the sound of the tool and I would be very happy and thankful 🙂 if they solved this problem in the next update