How to swap the buffers in 2 windows emacs

Question

I am using emacs I find that sometimes I have 2 files separated into 2 windows.

For example: I open 1 file using C-x C-f file1.c RET

and I split t

Answer 1

The transpose-frame library provides a pretty comprehensive set of functions for flipping or rotating the window arrangements in frames.

M-x flop-frame RET does what this particular question needs.

The following diagrams are from the commentary in the library (and its EmacsWiki page):

‘transpose-frame’ … Swap x-direction and y-direction

       +------------+------------+      +----------------+--------+
       |            |     B      |      |        A       |        |
       |     A      +------------+      |                |        |
       |            |     C      |  =>  +--------+-------+   D    |
       +------------+------------+      |   B    |   C   |        |
       |            D            |      |        |       |        |
       +-------------------------+      +--------+-------+--------+

‘flip-frame’ … Flip vertically

       +------------+------------+      +------------+------------+
       |            |     B      |      |            D            |
       |     A      +------------+      +------------+------------+
       |            |     C      |  =>  |            |     C      |
       +------------+------------+      |     A      +------------+
       |            D            |      |            |     B      |
       +-------------------------+      +------------+------------+

‘flop-frame’ … Flop horizontally

       +------------+------------+      +------------+------------+
       |            |     B      |      |     B      |            |
       |     A      +------------+      +------------+     A      |
       |            |     C      |  =>  |     C      |            |
       +------------+------------+      +------------+------------+
       |            D            |      |            D            |
       +-------------------------+      +-------------------------+

‘rotate-frame’ … Rotate 180 degrees

       +------------+------------+      +-------------------------+
       |            |     B      |      |            D            |
       |     A      +------------+      +------------+------------+
       |            |     C      |  =>  |     C      |            |
       +------------+------------+      +------------+     A      |
       |            D            |      |     B      |            |
       +-------------------------+      +------------+------------+

‘rotate-frame-clockwise’ … Rotate 90 degrees clockwise

       +------------+------------+      +-------+-----------------+
       |            |     B      |      |       |        A        |
       |     A      +------------+      |       |                 |
       |            |     C      |  =>  |   D   +--------+--------+
       +------------+------------+      |       |   B    |   C    |
       |            D            |      |       |        |        |
       +-------------------------+      +-------+--------+--------+

‘rotate-frame-anti-clockwise’ … Rotate 90 degrees anti-clockwise

       +------------+------------+      +--------+--------+-------+
       |            |     B      |      |   B    |   C    |       |
       |     A      +------------+      |        |        |       |
       |            |     C      |  =>  +--------+--------+   D   |
       +------------+------------+      |        A        |       |
       |            D            |      |                 |       |
       +-------------------------+      +-----------------+-------+