The TTY sequences to insert or move lines give all the information needed to avoid scrolling other parts of the screen.
Like most other things in the comments here, this is addressed in the article.
Like most other things in the comments here, this is addressed in the article.
Certainly for VT100 they do not - you can define the scroll region, but it's strictly "between line x and y" or "the whole screen" and you can only scroll up/down the entire region.
The article only address smooth scrolling of entire lines. How do you "scroll only the buffer on the right side of the screen"?