The mode does two things: First, it fixes point at its vertical
position during scrolling and second, it turns commands for vertically
moving point by lines or paragraphs into commands which scroll the
buffer by the respective amount. This results in a more pager- or
browser-like (as Miles put it) behavior. Like this it becomes very
easy to incrementally scroll the buffer up or down.
1. If people like this as an option, I won't object to it as a minor
mode.
2. scroll-preserve-screen-position should not affect anything
but scroll commands.
3. Do you want this in all buffers, or only in read-only buffers?
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