Steps to repeat: Emacs -Q Press fullscreen button C-x 5 2 C-x 5 0 Here, there is a black line at the top of the screen, with the same height as a menu bar, and the echo area is placed below the bottom of the screen. This was caused by `[screen visibleFrame]' sometimes including, sometimes excluding the menu are, when in full screen mode. I will push a fix shortly. -- Anders In GNU Emacs 25.0.50.23 (x86_64-apple-darwin14.5.0, NS appkit-1348.17 Version 10.10.5 (Build 14F27)) of 2016-01-25 built on macpro.lan Repository revision: c32f3bc4a383280587cf790b89f6c781d78cc42d Windowing system distributor 'Apple', version 10.3.1348 Configured using: 'configure --without-dbus --with-ns' Configured features: NOTIFY ACL ZLIB TOOLKIT_SCROLL_BARS NS Important settings: value of $LC_CTYPE: UTF-8 locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t global-eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message dired format-spec rfc822 mml mml-sec epg epg-config gnus-util mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode easymenu cl-loaddefs pcase cl-lib mail-prsvr mail-utils time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel ns-win ucs-normalize term/common-win tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese charscript case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote kqueue cocoa ns multi-tty make-network-process emacs) Memory information: ((conses 16 195374 9325) (symbols 48 19454 0) (miscs 40 43 181) (strings 32 14882 5640) (string-bytes 1 435622) (vectors 16 32730) (vector-slots 8 640548 4290) (floats 8 158 35) (intervals 56 190 0) (buffers 976 11))