Manual for Studio 8 iOS?

Struggling with limited documentation.

New to n-track iOS.
Use n-track on PC to handle Songtree downloads and uploads but do my real work on another DAW.
Slowly starting to use some features.
Recently bought n track 8 for iOS.
Struggling with driving iOS synths from a midi track.
Is there a better resource than the user manual.
Is there anything that shows what each icon does?