Typewriter scrolling: the line being edited stays put and the document
moves under it, the way a typewriter's platen does.
It only ever scrolls: the caret and the document are untouched, and it
moves nothing when the line is already close to where it belongs, so
ordinary typing does not jitter the page.
Typewriter scrolling: the line being edited stays put and the document moves under it, the way a typewriter's platen does.
It only ever scrolls: the caret and the document are untouched, and it moves nothing when the line is already close to where it belongs, so ordinary typing does not jitter the page.