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Desktop Settings panel
A slide-in panel from the right side of the window lets the user adjust theme, font family, body font size, and preview max-width. Open it with the gear icon in the title bar or Cmd/Ctrl+,. Close with the × button or Esc.
Settings
| Setting | Type | Values | Default |
|---|---|---|---|
| Theme | select | auto (follow OS) / light / dark / sepia | auto |
| Font family | select | system / sans (Inter-style) / serif (Georgia) / mono | system |
| Body font size | slider | 12–22 px | 15 px |
| Preview max-width | slider | 600–1400 px | 920 px |
Each control writes its change immediately — no Save button. State is persisted to state.json via mid:patch-app-state, so the next launch comes back with the same look.
How values are applied
applySettings() writes inline custom properties to :root:
| Setting | CSS variable | Source |
|---|---|---|
| Font family | --mid-font-sans | FONT_STACKS[choice] in renderer.ts |
| Font size | --mid-font-size-base | <n>px |
| Preview width | --mid-preview-max-width | consumed by main.viewing > .mid-preview |
| Theme | `<html class="dark | sepia">` |
The auto theme listens to nativeTheme.shouldUseDarkColors (already wired in apps/electron/main.ts) and toggles dark when the OS flips. light, dark, and sepia ignore the OS.
Sepia
A new :root.sepia block in tokens.css ships a warm-paper palette (warm fg #433422, paper bg #f4ecd8, amber accent #a06b2a). It's a third class alongside dark and is applied by applyResolvedTheme().
Reset to defaults
The "Reset to defaults" button writes the DEFAULT_SETTINGS block back to state and re-applies — useful after experimenting with extreme font sizes.
Keyboard
Cmd/Ctrl + ,— toggle the panel.Esc— close (only when the panel is open).
Files
apps/electron/renderer/index.html— gear button +<aside id="settings-panel">shell.apps/electron/renderer/renderer.ts—wireSettingsPanel(),applySettings(),applyResolvedTheme(),FONT_STACKS,DEFAULT_SETTINGS.apps/electron/renderer/renderer.css—.mid-settings*styles, slide-in animation.packages/ui-tokens/src/tokens.css—:root.sepiapalette block.apps/electron/main.ts/preload.ts—AppStateextended withfontFamily/fontSize/theme/previewMaxWidth.