Emacs交换行位置

vis*_*ise 3 emacs

如何更改行位置,如下所示:

This is the first row
And this is the second
Run Code Online (Sandbox Code Playgroud)

And this is the second
This is the first row
Run Code Online (Sandbox Code Playgroud)

谢谢.

Hig*_*ark 9

C-x C-t- 查看"换位"下的手册