Keyboard shortcuts

Action	Shortcut
Save the current composition	Ctrl / Alt + S
Play/pause the selected grid	Space
Undo the previous action	Ctrl / Alt + Z
Redo the next action	Ctrl / Alt + Shift + Z
Select all the blocks of the focused grid	Ctrl / Alt + A
Deselect all the blocks of the focused grid	Ctrl / Alt + D
Duplicate (copy/paste) the selected blocks	Ctrl / Alt + B
Delete all the selected blocks of the focused grid	Delete
Move vertically inside the grids	Scroll ↕
Move horizontally inside the grids	Shift + Scroll ↕
Zoom X	Ctrl / ⌘ + Scroll ↕ (above the grid)
Zoom Y	Ctrl / ⌘ + Scroll ↕ (above the keys/tracks)