We all think that the side margins of notebooks exist for appreciation or teacher marking or for good organization of note taking. Actually, the explanation is quite different.
This is why these perpendicular lines actually exist on the pages of a notebook.
Margins are lines that appear on the top, bottom, left, and right sides of the notebook to keep writing clear and primarily to help teachers add notes and comments for students.
They were not originally created to maintain alignment between annotations. Manufacturers began to apply margins to stationery to protect artwork. Earlier in history, rats and mice were common residents in many homes, and one of their favorite snacks was paper, among other things.
While rodents fed on books, brochures and newspapers containing valuable information, a solution to this problem had to be found. These little rodents love the taste of paper and tend to eat documents, especially around the edges. At the time, the margins appeared in the notebooks, which left the edges free, where more damage occurred, since the mice had more access to them. So laptop manufacturers came up with this clever idea to add margins to the edges and thus prevent any intrusion of pests. Therefore, your notes and information are safe at all times.
The margin also helped mitigate damage from wear and tear, which is why it was eventually adopted and retained. Therefore, people were able to protect all written information.
Why are there special colors for the margins and lines of your notebooks?
Color theory explains that the red line draws needed attention to where writers should stop, while the blue lines, being less vivid, are conspicuous enough to guide writing but not intrusive enough to affect reading.
Other theories suggest that the blue lines do not appear on printers. As a result, all the pages look neat and only show the words.
However, the use of the marginal line decreases over time. Due to the operation of spiral notebooks and diaries, the use of margins has been gradually decreasing.
read also What does the ‘7w7’ emoticon mean in WhatsApp and why is it used to flirt?