Documentation
Everything, written down.
Searchable, linkable and free to read without an account. If something here does not answer your question, that is a gap in the manual and we want to hear about it.
Getting started
Pattern editor
Mixer and effects
Sampler and instruments
Account and licensing
Reference
Keyboard shortcuts.
The ones worth memorising first. The full list ships with the program under Help, and it is printable.
Transport
Play or stop
Space
Toggle record
Shift
Play from cursor
Enter
Toggle loop
L
Editing
Duplicate selection
CtrlD
Interpolate
CtrlI
Transpose semitone
F2/F3
Humanise
CtrlShiftH
Navigation
Next track
Tab
Previous or next pattern
Ctrl←→
Jump one beat
PageUp
Go to row
CtrlG