VIM帮助文档如是说
Q_sc Scrolling
CTRL-E N CTRL-E window N lines downwards (default: 1)
CTRL-D N CTRL-D window N lines Downwards (default: 1/2 window)
CTRL-F N CTRL-F window N pages Forwards (downwards)
CTRL-Y N CTRL-Y window N lines upwards (default: 1)
CTRL-U N CTRL-U window N lines Upwards (default: 1/2 window)
CTRL-B N CTRL-B window N pages Backwards (upwards)
z<CR> z<CR> or zt redraw, current line at top of window
z. z. or zz redraw, current line at center of window
z- z- or zb redraw, current line at bottom of window说明
其实这里面最重要的就是最后三个，分别为使屏幕滚动以使当前行显示在最上面，显示在中间，显示在最下面。