(major non-side) window of a frame are provided. For details consult
the section "Side Windows" in the Elisp manual.
++++
+*** Support for atomic windows - rectangular compositions of windows
+treated by `split-window', `delete-window' and `delete-other-windows'
+like a single live window - is now official. For details consult the
+section "Atomic Windows" in the Elisp manual.
+
+++
*** New `display-buffer' alist entry `window-parameters' allows to
assign window parameters to the window used for displaying the buffer.