A function for setting the size on screen to be equal to the size on printout (like on Preview app in macOS). This would ensure that the size of the text/diagram on the screen can be reflected on a 1:1 scale to how it would look like when it is printed out. Such a function will give users a greater sense of context when using the app, especially if the exported note has to be printed.

For example, in the screenshot below, the width of the PDF open on the computer is equal to the width of an A4 paper in real life.