Optimize books created with iBooks Author for devices with Retina and non-Retina displays

Learn how to optimize the media content of your iBooks Author books for devices with Retina or non-Retina displays.

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

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Learn how to optimize performance in your iBooks Author books for devices with all display types.

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