Function: pop-to-buffer

Select buffer BUFFER in some window, preferably a different one.
BUFFER may be a buffer, a string (a buffer name), or nil. If it
is a string not naming an existent buffer, create a buffer with
that name. If BUFFER is nil, choose some other buffer. Return
the buffer.

This uses `display-buffer' as a subroutine. The optional ACTION
argument is passed to `display-buffer' as its ACTION argument.
See `display-buffer' for more information. ACTION is t if called
interactively with a prefix argument, which means to pop to a
window other than the selected one even if the buffer is already
displayed in the selected window.

If the window to show BUFFER is not on the selected
frame, raise that window's frame and give it input focus.

Optional third arg NORECORD non-nil means do not put this buffer at the front of the list of recently selected ones.