each corresponding to a top-level X window and each looking like
the screen on a TTY. Each frame contains one or more non-overlapping
Emacs windows (possibly with associated scrollbars, under X), an
-echo area, and (under X) possibly a menubar.
+echo area, and (under X) possibly a menubar, toolbar, and/or gutter.
@item Global
Global means `independent of the current environment; in effect