VIM Window panes changing orientation

Question

How do I go for from a formation like this

..........................................................
.                            .                           .
.                            .                           .
.             3              .                           .
.                            .                           .
.                            .                           .
..............................              1            .
.                            .                           .
.                            .                           .
.             2              .                           .
.                            .                           .
.                            .                           .
.                            .                           .
..........................................................

To one like this

..........................................................
.                                                        .
.                                                        .
.                             3                          .
.                                                        .
.                                                        .
..........................................................
.                             .                          .
.                             .                          .
.                             .                          .
.            2                .             1            .
.                             .                          .
.                             .                          .
.                             .                          .
..........................................................

Answer 1

Control-W K (note that the "K" must be shift+k (uppercase k)) will move the window your cursor is in to the very top of the screen, making it full width.

See ":help window-moving".

Answer 2

You can use ^w H, ^w J, ^w K, and ^w L to move the split windows. (Note the capital letters. If you were to do without holding shift, it would just change which window was focused).

So with your example, you could just move to window 3 and press ^W K.