press and hold shift and select the steps you wish to apply step components to. the leds of these steps will change to green indicating marked steps.
keep holding shift and select the component you wish to add by pressing the corresponding white piano key. then select the desired component setting with the value keys 1–0.
release shift and your step component is added.
alternatively, if you continue holding shift you can add a further component. you can also adjust the setting of a component by momentarily holding its corresponding white piano key.
quickly pressing an applied component will remove it.
pro-tip: try combining the last three step components (spark components) with the note-based step components. it’s possible to get some very interesting results.