The pattern edit widget is available as linking an editor index with a pattern sequencer e.g. drum or matrix.
Left, Left-Arrow
Move within notation left, as there is a pattern you get an audible feedback.
Right, Right-Arrow
Move within notation right, audible feedback as above.
Up, Up-Arrow
Move within notation up, audible feedback as above.
Down, Down-Arrow
Move within notation down, audible feedback as above.
Space
Add audio pattern and give audible feedback.
Delete
Remove audio pattern and give audible feedback.
Ctrl+c
Copy the selected pattern to clipboard.
Ctrl+x
Cut the selected pattern to clipboard.
Ctrl+v
Paste pattern from clipboard.
Ctrl+a
Select all.
Ctrl+i
Invert all.
Ctrl+m
Show/hide meta information.
Tab
Leave notation focus.