Final answer:
To read Leonardo Da Vinci's reverse-written notes, one would use a mirror.
Step-by-step explanation:
Leonardo Da Vinci was a prolific creator whose inventiveness was not limited to his renowned paintings, such as the Mona Lisa, but also extended to his journal writings. Interestingly, Da Vinci wrote his notes in reverse, starting from the right side of a page and moving to the left. This means that to read what Da Vinci wrote, one would need to use a mirror to properly view the reversed script. His oeuvre of reversed writings can be observed across his scientific illustrations, conceptual designs, and engineering notebooks, where he documented his thought experiments and discoveries.