the ProProctor guidelines state "Your testing space and surrounding area must be free of pens, paper, electronic devices, etc. No content that could potentially provide an unfair advantage during your exam, including that posted on walls or within your immediate area, should be present during your exam" If you really didn't want to take them down then I would pin a sheet to the wall to cover them. I highly recommend reading the https://www.prometric.com/files/ProProctor/ProProctorUserGuide.pdf VERY helpful!

It would be a nice option to not always have so many acronyms when reading these notes, or to give the option to hover the mouse over it to see the full word.