There are many useful contents, so it is helpful. It was especially good because I could learn how to use it in practice. However, the lecture work screen is large, so there are already many panel items on the left and right, and the icons and texts are all small, so it is hard to see even when I look at it in 1080 quality, my eyes hurt, and it is hard to concentrate. ㅠㅠ For example, since only the work screen at the top is related, it would be good to cut off the work screen at the bottom so that it can be seen a little larger.