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Subject: bug#80074: 31.0.50; tab-bar show more than one lines if tab bar has too many elements
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Hello,

When I put too many elements in tab-bar-format, the Emacs tab bar wraps
to two lines instead of staying on one line (see
https://imgur.com/a/qvIlzGm). I want it to stay only one line, how?

Thank you.

Eval.



In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo
version 1.18.4, Xaw3d scroll bars)
Repository revision: c6bdfaf358e25d7e30162d378dab9bb75e1220c2
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12401009
System Description: NixOS 25.11 (Xantusia)

Configured using:
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semantic/wisent/comp semantic/wisent semantic/wisent/wisent
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semantic/fw mode-local cedet docker-group aio dockerfile-mode
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evil-collection-vlf vlf vlf-base vlf-tune gptai ctrlf hl-line
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evil-collection-yaml-mode yaml-mode toml-mode conf-mode align highlight
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evil-collection-imenu imenu evil-collection-man man
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nerd-icons-data-octicon nerd-icons-data-pomicon nerd-icons-data-ipsicon
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elfeed-tube-autoloads aio-autoloads elfeed-autoloads
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nix-ts-mode-autoloads notmuch-autoloads nov-autoloads esxml-autoloads
nyan-mode-autoloads olivetti-autoloads orderless-autoloads
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org-journal-autoloads org-modern-autoloads org-roam-autoloads
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parchment-theme-autoloads parent-mode-autoloads parseedn-autoloads
parseclj-autoloads pdd-autoloads pdf-tools-autoloads pdfgrep-autoloads
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popup-autoloads popwin-autoloads pos-tip-autoloads powershell-autoloads
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easy-mmode pp format-spec edmacro kmacro compat cl-extra help-mode hydra
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restore-point-autoloads rfc-mode-autoloads rg-autoloads
ripgrep-autoloads rust-mode-autoloads rust-playground-autoloads
saveplace-pdf-view-autoloads scratch-autoloads sdcv-autoloads
sesman-autoloads shell-maker-autoloads sicp-autoloads
sideline-flycheck-autoloads flycheck-autoloads sideline-autoloads
sly-autoloads smartscan-autoloads solarized-theme-autoloads
solidity-mode-autoloads soothe-theme-autoloads autothemer-autoloads
spacious-padding-autoloads spinner-autoloads sqlite3-autoloads
sqlup-mode-autoloads srcery-theme-autoloads ssh-config-mode-autoloads
standard-themes-autoloads string-inflection-autoloads
subatomic256-theme-autoloads sudo-edit-autoloads super-save-autoloads
svg-tag-mode-autoloads svg-lib-autoloads symbol-overlay-autoloads
symex-autoloads evil-surround-autoloads evil-cleverparens-autoloads
smartparens-autoloads evil-autoloads goto-chg-autoloads
paredit-autoloads lispy-autoloads swiper-autoloads ivy-autoloads
iedit-autoloads systemd-autoloads rx tab-line-nerd-icons-autoloads
tablist-autoloads taxy-magit-section-autoloads taxy-autoloads
magit-section-autoloads llama-autoloads telega-autoloads
texfrag-autoloads auctex-autoloads tex-site timeout-autoloads
toc-mode-autoloads tok-theme-autoloads toml-autoloads
toml-mode-autoloads transient-autoloads transpose-frame-autoloads
tree-sitter-autoloads treebundel-autoloads
treemacs-all-the-icons-autoloads all-the-icons-autoloads
treemacs-magit-autoloads finder-inf treemacs-nerd-icons-autoloads
treemacs-autoloads cfrs-autoloads ht-autoloads hydra-autoloads
lv-autoloads pfuture-autoloads ace-window-autoloads avy-autoloads
s-autoloads nerd-icons-autoloads treepy-autoloads
tron-legacy-theme-autoloads tsc-autoloads ultra-scroll-autoloads
undo-fu-autoloads uwu-theme-autoloads vagrant-autoloads
vertico-posframe-autoloads vertico-prescient-autoloads
prescient-autoloads vertico-truncate-autoloads vertico-autoloads
vimrc-mode-autoloads vlf-autoloads vterm-autoloads w3m-load
w3m-autoloads wakatime-mode-autoloads weather-metno-autoloads
web-mode-autoloads web-server-autoloads webpaste-autoloads
request-autoloads websocket-autoloads wgrep-autoloads
which-key-posframe-autoloads posframe-autoloads
wildcharm-theme-autoloads with-editor-autoloads wordreference-autoloads
writeroom-mode-autoloads visual-fill-column-autoloads xml+-autoloads
info dash-autoloads xterm-color-autoloads yaml-autoloads
yaml-mode-autoloads yasnippet-capf-autoloads
yasnippet-snippets-autoloads yasnippet-autoloads zen-mode-autoloads
zenburn-theme-autoloads zig-mode-autoloads reformatter-autoloads
zoom-autoloads zoutline-autoloads package browse-url xdg url url-proxy
url-privacy url-expand url-methods url-history url-cookie
generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse
auth-source cl-seq eieio eieio-core cl-macs icons password-cache json
subr-x map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs cl-lib
rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook
vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd touch-screen tool-bar dnd fontset image regexp-opt
fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode
register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors
frame minibuffer nadvice seq simple cl-generic indonesian philippine
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 composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure
cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
files window text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget keymap hashtable-print-readable backquote
threads dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo x-toolkit xinput2 x multi-tty move-toolbar
make-network-process tty-child-frames native-compile emacs)

Memory information:
((conses 16 4253522 14935552) (symbols 48 186253 8592)
  (strings 32 680991 294176) (string-bytes 1 24329443) (vectors 16 185080)
  (vector-slots 8 2852093 3087898) (floats 8 3765 25875)
  (intervals 56 18658 6624) (buffers 1064 67))

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To: Eval Exec <execvy@HIDDEN>
Subject: bug#80074: Acknowledgement (31.0.50; tab-bar show more than one
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Subject: bug#80074: 31.0.50; tab-bar show more than one lines if tab bar has too many elements
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close 80074 31.0.50
thanks

> When I put too many elements in tab-bar-format, the Emacs tab bar wraps
> to two lines instead of staying on one line (see
> https://imgur.com/a/qvIlzGm). I want it to stay only one line, how?

You can use the new variable 'tab-bar-truncate' in Emacs 31.

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From: Juri Linkov <juri@HIDDEN>
To: Eval Exec <execvy@HIDDEN>
Subject: Re: bug#80074: 31.0.50; tab-bar show more than one lines if tab bar
 has too many elements
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Date: Fri, 26 Dec 2025 09:27:35 +0200
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close 80074 31.0.50
thanks

> When I put too many elements in tab-bar-format, the Emacs tab bar wraps
> to two lines instead of staying on one line (see
> https://imgur.com/a/qvIlzGm). I want it to stay only one line, how?

You can use the new variable 'tab-bar-truncate' in Emacs 31.

Last modified: Fri, 26 Dec 2025 07:45:02 UTC

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