In the screenshot above, the green markers are when I've reported dreams. This is intended to help you see which reminder might've been integrated into a dream. If you have a red light reminder with powerful music, as you tap on the dream from the same sleep cycle, you will be able to tell if the reminder was integrated into the dream's content.

As you align the Singularity screen black marker with your bedtime, each reminder on the singularity experience would align with the end of a sleep cycle. So for the image above, my first reminder would be played for the first dream, 2nd reminder for the 2nd dream, etc.