Well there's a quick start guide and then you have to search around, but there is a manual. You probably found video series (I think there's something like 10 short videos) that could help.
I'm responding because I had trouble getting an external midi keyboard working. In the Effects menu there is a midi effect already in place. I thought that would take of my midi needs. But for me, others might have some different experience, that didn't work. For me to get the keyboard working, if you add an effect there is a Midi effect selection. That's the one to add. A little confusing.
Good luck.