Thank you for taking the time to answer my question, Victoria. I stand corrected: Exit using the F key does indeed bring me back to the previous screen mode in 5.3. I guess I was either subconsciously pressing G or D to go straight to the desired module or this has been fixed in in 5.3.
Anyhow, using the F key to enter _and_ exist Full Screen Preview works well enough for me right now. Once again thank you for helping me out.