Currently running scenes are visible in the "Active scenes" panel. If two scenes have overlapping lamps the scene on the left takes priority. Drag the titles across to change the priority of the scenes. In case of a full overlap the eclipsed scene will be removed after a short period of time.
Your current lighting arrangement can be saved as a preset by tapping on the "Save" button. You can recall the preset later and the saved scenes will be launched at once.