### Settings Screen

All settings are saved to flash and restored on next boot. Settings are organised into collapsible sections — press Enter on a section header to expand or collapse it. All sections start collapsed for faster navigation.

- **Display**
  - Brightness
  - Auto-off timeout
  - Battery display mode (icon, %, V)
  - Clock seconds (show/hide — hiding reduces display refresh from 1 s to 60 s)
  - Clock format (12 h / 24 h)
  - Font — **Default** (5×7 Adafruit, ASCII + transliteration) or **Lemon** (native Unicode, pixel-accurate wrap)
  - Display rotation *(e-ink only)* — 0 ° / 90 ° / 180 ° / 270 °; applied immediately
  - Joystick rotation *(e-ink only)* — rotates the joystick input mapping independently of the display rotation; useful when mounting the device in a custom enclosure
  - Full refresh interval *(e-ink only)* — how many partial refreshes before a cleansing full refresh (off / 5 / 10 / 20 / 30); reduces ghosting on long sessions
- **Sound**
  - Buzzer: On / Off / **Auto** — Auto mode silences the device while connected via Bluetooth, and re-enables sound when the connection drops
  - Volume (1–5; preview tone plays on each change)
  - DM Melody — notification sound for incoming private messages: built-in, Melody 1, or Melody 2
  - Channel Melody — notification sound for incoming channel messages: built-in, Melody 1, or Melody 2
- **Home Pages** — toggle visibility and reorder individual home screen pages; press LEFT / RIGHT on any entry to move it earlier or later in the navigation sequence; press ENTER to toggle ON / OFF (Settings and Messages are always visible and cannot be disabled)
- **Radio**
  - TX power
- **System**
  - Timezone (UTC offset in hours)
  - Low battery shutdown threshold
  - Auto-lock — automatically locks the device when the display turns off
- **Contacts**
  - Show all DMs or favourites only
  - Show all room servers or favourites only
- **Messages**
  - Edit up to 10 quick reply templates (Q1–Q10)