Boox Palma Screensaver Size: 824 × 1648 px

Choosing an Image for the Boox Palma

Getting the pixel dimensions right is only half of it. This panel has its own characteristics, and they change what kind of source image holds up on screen.

• At 300 ppi this panel resolves fine detail well. Thin linework, small lettering and subtle tonal gradients all survive, so detailed illustration and photography both work.
• The 1:2 screen is far taller and narrower than a normal e-reader. A standard e-reader wallpaper will lose most of its width when cropped to fit, so start from a tall portrait image or one with a vertical composition.
• E-ink is greyscale, so colour contrast disappears on screen. Check that your image still separates into clear light and dark areas once colour is removed — two colours of similar brightness will merge into one flat tone.

How to prepare an image for e-ink: contrast, banding and dithering →

How to Set a Custom Screensaver on the Boox Palma

Boox devices run Android, so the sleep screen is set from the system settings — point the screensaver option at an image you have copied onto the device. Boox also runs KOReader, which has its own wallpaper setting.

1. 1

   Resize the image

   Size the image to your Boox device's exact screen resolution using the resizer above, then download it.

2. 2

   Copy it to the device

   Transfer the image over USB, or use the device's own cloud sync or file transfer app to get it into internal storage.

3. 3

   Open the screensaver settings

   In the Boox system settings, find the power or screensaver section and choose the option to use a custom image or image folder.

4. 4

   Select your image

   Browse to the image you copied across and select it, then sleep the device to confirm.

Note: Boox firmware changes often and menu names vary between models and versions, so the exact wording of the screensaver setting may differ from the description above.

KOReader screensaver guide (works on Boox) →

Boox Palma Screensaver FAQ

What size should a Boox Palma screensaver be?

A Boox Palma screensaver should be 824 x 1648 pixels — the device's exact panel resolution. That is a 6.13-inch screen with a 1:2 aspect ratio at 300 ppi. Matching these dimensions means the image fills the screen with no stretching, cropping or black bars.

What format should the image be in?

PNG or JPG both work on the Boox Palma. PNG keeps sharp edges cleaner on text and line art, which suits e-ink. Because the screen is greyscale, high-contrast images with simple composition reproduce far better than busy colour photographs.

Does the Boox Palma support custom screensavers?

Boox devices run Android, so the sleep screen is set from the system settings — point the screensaver option at an image you have copied onto the device. Boox also runs KOReader, which has its own wallpaper setting.

Can I use the same image on other e-readers?

Not without re-cropping. The Boox Palma is the only supported device using a 824 x 1648 panel, so an image sized for it will be cropped or letterboxed on any other model. Re-export at the target device's own resolution instead.