| Feature | Device with Retina display | Device without Retina display |
|---|---|---|
| Interactive Image widgets | Use images that are 4096 pixels wide | Use images that are no more than 2048 pixels wide |
| All other images | Use images that are 2048 pixels wide | Use images that are no more than 1024 pixels wide |
| Keynote Widget | Set slide size to 2048 by 1536 in your Keynote presentation | Use the default slide size of 1024 by 768 in your Keynote presentation |
| 3D Models | Use up to 50,000 moderately textured polygons | Use up to 20,000 moderately textured polygons |
Learn more
Learn how to optimize performance in your iBooks Author books for devices with all display types.