# Font Customization

Font settings control the typeface and size used in the translation grid and the companion tabs.

### What you can change

* **Font family** – any font installed on your system; the dropdown shows available fonts
* **Font size** – point size for the grid; companion tabs use the same family at their own size
* **Global UI font scale** – a single slider that scales every UI element (menus, tabs, settings, Chat panel, Clipboard history, SuperLookup, status bar) at once

### Choosing a font

* For general translation work, a clear humanist sans-serif (Segoe UI, Inter, Calibri) keeps long sessions comfortable
* For technical or code translation, a monospaced font (Consolas, JetBrains Mono) can help align numbers and symbols
* For right-to-left languages (Arabic, Hebrew), choose a font with good RTL glyph coverage

### Global UI font scale (Retina / high-DPI displays)

Settings → AI Settings → **🖥️ Global UI Font Scale** holds a single slider (50%–200%, default 100%) that scales the entire application UI – not just the grid. Useful when you find Qt's defaults uncomfortably small on a MacBook Retina screen, a 4K monitor, or any high-DPI display.

The slider covers:

* The grid (segment numbers, type column, source and target text)
* Companion tabs (Clipboard 3-column tree, SuperLookup web resources, Voice command table, Chat panel)
* QuickTrans always-on-top popup
* Tabs, settings panels, AI tools, status bar, menus
* Termbase and TM panes

Apply the change with the **Apply** button next to the slider; most areas update immediately. Lazy-constructed widgets (Clipboard, SuperLookup, Voice) pick up the new size when they are next opened, so switch away from a companion tab and back once after changing the slider.

If you've also customised the grid font size (above), that value still applies on top of the scale – so a 12 pt grid font at 150% renders at 18 pt. Grid zoom (Ctrl+= / Ctrl+-) continues to work at any scale.

### Tips

* Font changes apply immediately in the grid – no restart needed
* If glyphs for a specific language appear as boxes, install a font with full Unicode coverage for that script (Noto Sans is a good all-rounder)
* On a 4K or Retina display, try 125% or 150% UI scale before reaching for individual font-size sliders – it keeps every panel proportional
* The QuickTrans popup's header controls (🔍 Run in SuperLookup, ⚙ Settings) deliberately don't scale with the slider, because they live in fixed-size buttons and scaling the glyph alone would overflow them

### Related pages

* [View Settings](/help/settings-1/view.md)
* [Theme (Light/Dark Mode)](/help/settings-1/theme.md)


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