In what distinctive manner were many of Da Vinci's concepts recorded in his codices?

Written in his distinctive mirror script

A notable characteristic associated with Leonardo da Vinci's prolific notebooks, where thousands of pages of concepts were recorded, is the manner in which the accompanying text was written. Much of his detailed documentation, including blueprints for complex machinery like the armored car or the aerial screw, was penned using his highly distinctive mirror script. This method involved writing from right to left, often requiring a reflective surface for easy reading by a right-handed person. While this script made the immediate interpretation of his theories challenging for casual observers, it served as a unique method for preserving his thoughts and designs within his private codices.