^WJ can not split and open new window in my vim

Question

it is said that ^WJ splits the window and opens a window above the current window.
when i input :CTRL+WJ,no action of splits the window and opens a window happen in my vim.

Answer 1

CTRL+W+J does not split your window and "creates" and opens a new window. Rather, it helps you in moving across multiple windows which might be open on your screen.

CTRL+W commands are simply for moving across multiple windows, which you might have open

CTRL+W+J will move one "window" down in the list of open windows

You can refer to this article for more on VIM commands for moving windows