How can you switch your current windows from horizontal split to vertical split and vice versa in Vim?

^w followed by capital H,J,K or L will move the current window

to the far left,bottom,top or right respectively

like normal cursor navigation.

Ctrl + w H : move current window to the left

Ctrl + w J  : move current window to the bottom

Ctrl + w K : move current window to the top

Ctrl + w L : move current window to the right