Even if chain 2 and 3 are linked together, you can still decide to trigger chain 3 anytime
you want. When the currently playing pattern will end, chain 3 will start, and when chain
3 finishes, it will move to chain 2.
You can select patterns in a chain: Clicking on a pattern will select it. Clicking on a
pattern and holding [Shift] lets you select multiple patterns. You can then drag and drop
these patterns to another chain, or copy them using [Ctrl]+Drag and Drop on Windows
or [Alt]+Drag and Drop on Mac. You can also delete them using the [Del] key or the
Delete button [9].