Pens with phosphor in the composition of their ink are called highlighters. Highlighter pens have a special importance among stationery products. Its products, which appeal to almost every age and taste group, are frequently preferred due to their ergonomic features and ink quality. Another reason for preference is that highlighter pens, which are appreciated by users from many professions, especially students, do not contain acetate. The bright ink of these products, which are the choice of conscious parents, has a wide color scale to appeal to the colorful world of children. These products, which are also very affordable in terms of price, contribute to making important issues permanent in our minds in our texts and notes with almost any color ink. Highlighters are distinguished from each other by their beautiful colors and different nib thicknesses. The main factor that determines which type of highlighter you buy is where and for what purpose you want to use it. The markings you will make with highlighter pens suitable for your intended use strongly affect learning and storing information in memory. On the other hand, the colors, sizes, and grip properties of highlighter pens are also extremely important. The color you choose should be suitable for the markings you will make. which are the most preferred colors for highlighters, you should consider how these markings will affect your mind. Colors can have different effects on different users. While one user might want to mark the most important point with a yellow highlighter, another may prefer a green one. Your color choices should align with your own visual and cognitive assessment processes.