如何防止 Emacs 用鼠标滚动超过缓冲区的末尾？

Question

默认行为是 Emacs 将最后一行滚动到框架的中心。使用鼠标滚动时如何将最后一行保持在框架的底部？

Answer 1

(setq scroll-conservatively 101)

这是来自*Help* 窗口的信息，由describe-variable 生成：

scroll-conservatively is a variable defined in `C source code'.
Its value is 101
Original value was 0

Documentation:
Scroll up to this many lines, to bring point back on screen.
If point moves off-screen, redisplay will scroll by up to
‘scroll-conservatively’ lines in order to bring point just barely
onto the screen again.  If that cannot be done, then redisplay
recenters point as usual.

If the value is greater than 100, redisplay will never recenter point,
but will always scroll just enough text to bring point into view, even
if you move far away.

A value of zero means always recenter point if it moves off screen.

You can customize this variable.