First of all, the lecture content and structure are good, and the explanations are organized in an easy-to-understand way, so I'm listening well. But it seems like no one mentioned this in the reviews... It seems like there's a lot of empty space in the lecture besides the source window. When watching the lecture on a pad or laptop, the source code doesn't catch the eye, so even if it's not zooming in on the source part, if you could adjust the overall enlargement of the source window or font size so that the source content can be better absorbed, I think I could take the course better.