Trap Doors

The last time I put my memory theatre to use was when I dispursed my prefixes. In doing so, I used a "trap door" into a non existant basement. This imaginary room was very useful because it gave me spaces to store however much information I needed. However, after a while, it became a bit difficult as the imaginary room was pitch black, and items began to disappear within. It would be interesting to look into this "trap door" situation and figure out a way to make things easier to see. I have the 9 characteristics from Ong to memorize still, so I would like to explore the world of trap doors further.