Customize

Sleep screens, themes, fonts, KOReader sync, and the reading timer.

Firmware 1.6.5-ko.11 · screens from the X3 (Korean UI)

Sleep screen

Choose it in Settings → Display → Sleep Screen. It appears when you hold the power button or the device sleeps on its own.

Dark (default): CrossPoint logo on black
Light: Logo on white
Custom: A BMP/PNG image from the SD card. Falls back to Dark
Cover: The current book's cover. Falls back to Dark without a book
Cover + Custom: The cover if you were reading, Custom otherwise
None: Blank screen
Quick Resume: Leaves the page on screen with a moon icon, so you can pick up instantly
Transparent: Lays a sleep image over the page you were reading; the page shows through transparent pixels

Sleep screen: customSleep Screen = Custom, Cover Filter = Contrast

Sleep images: create a /.sleep/ (or /sleep/) folder on the SD card and add BMPs or PNGs; one is picked at random each time. Custom and Transparent use the same images; the mode only decides how one is drawn (Custom replaces the screen, Transparent lays it over the page). Upstream's /.sleep-overlay/ and /sleep-overlay/ folders join the same list. A single root /sleep.bmp or /sleep.png (Custom) or /sleep-overlay.bmp or /sleep-overlay.png (Transparent) takes priority over the folders. The example screen is a single 480×800 grayscale BMP in /.sleep/ with Sleep Screen Cover Filter set to Contrast.

In Select Sleep Screens (Settings → Display), preview the images one by one and tick the ones to use. Previews are drawn exactly as the sleep screen draws them, and one selection is shared by every mode. If none are ticked, all are used. On touch devices, tap the right or left of the image to page and tap the Selected strip at the bottom to tick.

In Transparent, the page shows only through transparent PNG pixels (or white pixels in a plain BMP). A fully opaque image covers the whole page.

To use Quick Resume only for automatic sleep, turn on Quick Resume on Timeout. Adjust covers with Cover Mode (Fit/Crop) and Cover Filter (None/Contrast/Inverted).

Uncompressed 24-bit BMPs or PNGs at the screen size look best: 528×792 on the X3 and 480×800 on the X4 (portrait). For other devices, check Resolution under Settings → System → About (width and height are listed the other way round). The Wallpaper Converter makes this easy.

Themes

Home with a book in progressBack out of a book

Change the look of Home and lists in Settings → Display → UI Theme. It applies right away.

Classic: Plain list
Lyra (default): Cover tile for the current book at the top
Lyra Extended: Up to three recent books on Home
RoundedRaff: Rounded-corner design
Cover Grid: Covers in a grid. S3 devices with extra memory only (not X3 or X4)

For a dark screen, turn on Night Mode (Settings → Display, or the reader menu) rather than looking for a dark theme.

Fonts

System fontSettings → Display → System Font (UI)

Body font: Settings → Reader → Reader Font Family. The default is Pretendard. It applies immediately and keeps your place; the book is re-indexed with the new font. To read in KoPub Batang, download KoPubBatang-14.epdfont below, put it in /fonts on the SD card, and pick it.

Download KoPub Batang 14pt (.epdfont, 3.0 MB)

KoPubBatang-14.epdfont

Menu font: Settings → Display → System Font (UI). The default is Pretendard, which also fills in any characters missing from the font you pick.

Adding fonts

Convert a TTF or OTF to .epdfont with the font converter. Each size becomes its own file, and you choose the text size by choosing the file.
Copy the files to /fonts, /.fonts, or /.crosspoint/fonts on the SD card. Subfolders such as /fonts/Family/Family_size.epdfont are fine.
Pick the font from Reader Font Family (or System Font) on the device.

.cpfont and TTF files cannot be used directly on the device. Variable fonts, color (emoji) fonts, and bitmap-only fonts are not supported. See Korean fonts for more.

KOReader sync

Sync your reading position with other devices (such as the KOReader app) through a KOReader-compatible sync server.

Use the public server (sync.koreader.rocks)

KOReader syncSettings → System → KOReader Sync

Open Settings → System → KOReader Sync.
Enter a Username and Password. Type the password as is; the device sends its MD5 hash.
Leave Sync Server URL empty or set it to https://sync.koreader.rocks.
Run Authenticate if you have an account, or Sign Up if you don't.

On the same screen, choose Document Matching (Filename/Binary), whether to send document metadata, and Sync Behavior (Ask Every Time/Smart Sync). If file names differ between your devices, switch matching to binary.

While reading, choose reader menu → Sync Progress to fetch the server position. Apply remote progress jumps there; Upload local progress sends your current position. Set Settings → Controls → Long-Press Menu to KOSync to open it by holding Confirm.

Host your own server (Docker)

You can also run a sync server on your home network.

mkdir -p kosync && cd kosync
cat > compose.yaml <<'YAML'
services:
  kosync:
    image: koreader/kosync:latest
    ports:
      - "7200:7200"
      - "17200:17200"
    volumes:
      - ./data/redis:/var/lib/redis
    environment:
      - ENABLE_USER_REGISTRATION=true
    restart: unless-stopped
YAML

docker compose up -d

Check it: curl -H "Accept: application/vnd.koreader.v1+json" http://SERVER-IP:17200/healthcheck
Register a user with Sign Up on the device.
Set the device's Sync Server URL to http://SERVER-IP:17200, or https://SERVER-IP:7200 for HTTPS.

Over plain HTTP the password hash travels as is. Use HTTPS outside your home network or on public Wi-Fi, and use a password you don't use anywhere else.

Reading timer

Each book tracks how long you have read it. In both EPUB and TXT it shows as “Reading Time” on the top line of the reader menu (e.g. 45m, 1h 23m).

Turning pages or returning from the menu: Time adds up
Auto page turn running: Keeps adding up
No input for 5 minutes: Pauses; resumes on the next input
While in the menu or chapter list: Not counted
Sessions under 30 seconds: Not saved
Every 5 minutes of reading, and when you close the book: Saved

Reader menu → Reset Reading Timer sets only this book's time back to zero. The timer lives in the book cache, so clearing the reading cache erases it too.