In GNU Emacs OSX, how to hide the title bar?

Question

In GNU Emacs on OSX Mavericks, how can I hide the title bar even if I'm not in full screen Mavericks? I would prefer my Emacs to fill the whole frame.

Answer 1

You can set the variable ns-auto-hide-menu-bar to a value other than zero to hide the menu bar.

Alternatively, you can place the window title above the top of the screen if you do this programmatically. (OS X does not allow you to drag the frame above the top of the screen.)

For example: the next position will be in the edit area at the top of the display.

 (setq ns-auto-hide-menu-bar t) (set-frame-position nil 0 -24) (tool-bar-mode 0) (set-frame-size nil 150 80) ;; Pick values matching your screen. 

Note. This may require Emacs 24.4 (which is still in pre-testing).

Alternatively, you can use the Multicolumn package to place and resize the frame (this is not OS X, but it knows about functions like automatically hiding the menu bar.)

Answer 2

EDIT: I added the patch below (slightly modified further) to my own github repository . I also included this patch in the homebrew "emacs-plus" formula as an option --with-no-title-bars : brew install emacs-plus --with-no-title-bars .

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Many people call this “borderless,” sometimes without even referring to the title bar.

For GNU emacs there is a recent (October 2016) patch for removing the title bar (regardless of the size of the emacs window) in Emacs Bug Lists ¹

If someone uses d12frosted / homebrew-emacs-plus or the emacs version that the formula uses, here is a (only) modified compatible version of the above patch:

 diff --git a/lisp/cus-start.el b/lisp/cus-start.el index d9ad0a5..9e52d0f 100644 --- a/lisp/cus-start.el +++ b/lisp/cus-start.el @@ -446,6 +446,7 @@ minibuffer-prompt-properties--setter (ns-use-native-fullscreen ns boolean "24.4") (ns-use-fullscreen-animation ns boolean "25.1") (ns-use-srgb-colorspace ns boolean "24.4") + (ns-use-titled-windows ns boolean "25.2") ;; process.c (delete-exited-processes processes-basics boolean) ;; syntax.c diff --git a/src/nsterm.mb/src/nsterm.m index 1b44a73..d013101 100644 --- a/src/nsterm.m +++ b/src/nsterm.m @@ -6775,11 +6775,13 @@ - (BOOL)isOpaque maximizing_resize = NO; #endif - win = [[EmacsWindow alloc] + win = [[EmacsFSWindow alloc] initWithContentRect: r styleMask: (NSResizableWindowMask | #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7 - NSTitledWindowMask | + (ns_use_titled_windows ? + NSTitledWindowMask : + NSWindowStyleMaskBorderless) | #endif NSMiniaturizableWindowMask | NSClosableWindowMask) @@ -6812,6 +6814,7 @@ - (BOOL)isOpaque [win setTitle: name]; /* toolbar support */ + if ( ns_use_titled_windows ) { toolbar = [[EmacsToolbar alloc] initForView: self withIdentifier: [NSString stringWithFormat: @"Emacs Frame %d", ns_window_num]]; @@ -6833,6 +6836,7 @@ This avoids an extra clear and redraw (flicker) at frame creation. */ } #endif FRAME_TOOLBAR_HEIGHT (f) = 0; + } tem = f->icon_name; if (!NILP (tem)) @@ -8759,6 +8763,12 @@ Nil means use fullscreen the old (< 10.7) way. The old way works better with This variable is ignored on OSX < 10.7 and GNUstep. */); ns_use_srgb_colorspace = YES; + DEFVAR_BOOL ("ns-use-titled-windows", ns_use_titled_windows, + doc: /*Non-nil means to include a title on windows. Nil means to +omit the title on OSX >= 10.7. This variable is ignored on OSX < +10.7. Default is nil. */); + ns_use_titled_windows = NO; + /* TODO: move to common code */ DEFVAR_LISP ("x-toolkit-scroll-bars", Vx_toolkit_scroll_bars, doc: /* Which toolkit scroll bars Emacs uses, if any. 

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• It is based on nikhilunni / BorderlessEmacs and gwydirsam / emacs-mac-borderless . The latter applies to emacs-mac, not GNU emacs, but the patch is pretty similar (see this porting request for an example of adding such a patch to the homebrew formula, and to see the patch itself).