Use Blue Ink When Studying

When I was a student I used to write important details in blue. A week before exams and recorded weekly quizzes, I write an output of the weekly lessons on a piece of paper using blue ink. Write the output as early as possible to get more time to study. I can read my lessons while I write important things to remember. I write them in blue so that I can recall which words I wrote with such color. The said color is relaxing to the eyes. Blue ink is also used in signatures to easily identify its originality.