Customizing Fonts in GNOME: GUI and CLI Methods

GNOME’s default Settings app doesn’t expose comprehensive font options, but GNOME Tweaks and command-line tools give you full control over typefaces across the desktop, shell, and window decorations.

Installing GNOME Tweaks

GNOME Tweaks is the easiest way to customize fonts. Install it on your system:

Fedora:

sudo dnf install gnome-tweaks

Debian/Ubuntu:

sudo apt install gnome-tweaks

Arch:

sudo pacman -S gnome-tweaks

Configuring Fonts in GNOME Tweaks

Open GNOME Tweaks and navigate to the Appearance tab (in newer versions) or Fonts section. You can customize:

• Interface Font — controls UI elements (buttons, menus, labels)
• Document Font — used in text editors and document viewers
• Monospace Font — applied to terminals and code editors
• Legacy Window Titles — titlebar font (if available in your GNOME version)

Changes apply immediately in most cases. If they don’t, restart GNOME Shell:

killall -HUP gnome-shell

Or use the older method (Alt+F2, type r, press Enter).

Configuring Window Title Fonts with gsettings

GNOME Tweaks may not expose all titlebar font options. Use gsettings directly for finer control:

gsettings set org.gnome.desktop.wm.preferences titlebar-font 'Sans Bold 11'
gsettings set org.gnome.desktop.wm.preferences titlebar-uses-system-font false

Check your current settings:

gsettings get org.gnome.desktop.wm.preferences titlebar-font

Reset to defaults:

gsettings reset org.gnome.desktop.wm.preferences titlebar-font

Font format is 'FontName Style Size'. Common examples:

• 'Sans 10'
• 'Monospace Bold 12'
• 'Noto Serif 11'
• 'Ubuntu Mono 13'

Size is in points, not pixels.

Customizing GNOME Shell Theme Fonts

GNOME Shell (the top bar, notifications, Activities overview) uses CSS-based styling. To modify shell fonts:

First, check which theme you’re using:

gsettings get org.gnome.shell.extensions.user-theme name

System themes are typically in /usr/share/gnome-shell/themes/[theme-name]/gnome-shell.css. User themes are in ~/.local/share/gnome-shell/themes/[theme-name]/gnome-shell.css.

Before editing, create a backup:

cp gnome-shell.css gnome-shell.css.bak

Edit the CSS file and modify font declarations:

stage {
  font-family: 'Noto Sans', sans-serif;
  font-size: 11pt;
}

#panel {
  font-size: 11pt;
  font-weight: 500;
}

.clock-display {
  font-family: 'Monospace';
  font-size: 12pt;
}

After saving, restart GNOME Shell:

killall -HUP gnome-shell

If changes don’t apply, log out and back in.

System-Wide Font Configuration

To set GTK font defaults that apply across most applications, edit ~/.config/gtk-3.0/settings.ini:

[Settings]
gtk-font-name = Noto Sans 10
gtk-monospace-font-name = Noto Mono 10

For GTK 4 applications (increasingly common), also create or edit ~/.config/gtk-4.0/settings.ini:

[Settings]
gtk-font-name = Noto Sans 10
gtk-monospace-font-name = Noto Mono 10

Then reload settings:

dconf update

Advanced Configuration with dconf-editor

For lower-level control and discovery of undocumented settings, install dconf-editor:

sudo dnf install dconf-editor

Navigate to org.gnome.desktop.interface to view all font-related keys. This is useful for discovering hidden options but be cautious—changing wrong values can break your desktop. Always note the original value before changing anything.

Listing Available Fonts

To see what fonts are installed on your system:

fc-list : family | sort | uniq

For monospace fonts only:

fc-list : family spacing | grep scalable | grep spacing=100 | awk '{print $1}' | sort | uniq

Verifying Font Changes

Check what fonts are currently configured:

gsettings list-keys org.gnome.desktop.interface | grep font
gsettings get org.gnome.desktop.interface font-name

For GTK settings:

grep gtk-font-name ~/.config/gtk-3.0/settings.ini

Persistence and Troubleshooting

Font changes made through GNOME Tweaks or gsettings persist across sessions automatically. CSS modifications to theme files require manual reapplication if the theme updates.

If fonts revert unexpectedly, check if a theme update overwrote your CSS changes:

diff gnome-shell.css gnome-shell.css.bak

For applications that ignore system fonts, check if they have their own font configuration files (many browsers and development tools do).

If GNOME Shell becomes unresponsive after CSS modifications, revert your changes and restart:

cp gnome-shell.css.bak gnome-shell.css
killall -9 gnome-shell