Return a newly created frame displaying the current buffer.
Optional argument PARAMETERS is an alist of frame parameters for
the new frame. Each element of PARAMETERS should have the
form (NAME . VALUE), for example:
(name . STRING) The frame should be named STRING.
(width . NUMBER) The frame should be NUMBER characters in width.
(height . NUMBER) The frame should be NUMBER text lines high.
You cannot specify either `width' or `height', you must specify
neither or both.
(minibuffer . t) The frame should have a minibuffer.
(minibuffer . nil) The frame should have no minibuffer.
(minibuffer . only) The frame should contain only a minibuffer.
(minibuffer . WINDOW) The frame should use WINDOW as its minibuffer window.
(window-system . nil) The frame should be displayed on a terminal device.
(window-system . x) The frame should be displayed in an X window.
(display . ":0") The frame should appear on display :0.
(terminal . TERMINAL) The frame should use the terminal object TERMINAL.
In addition, any parameter specified in `default-frame-alist',
but not present in PARAMETERS, is applied.
Before creating the frame (via `frame-creation-function-alist'),
this function runs the hook `before-make-frame-hook'. After
creating the frame, it runs the hook `after-make-frame-functions'
with one arg, the newly created frame.
If a display parameter is supplied and a window-system is not,
guess the window-system from the display.
On graphical displays, this function does not itself make the new
frame the selected frame. However, the window system may select
the new frame according to its own rules.