Optimizing performance in your iBooks Author books
You can use iBooks Author to create media-rich books compatible with iBooks on iPad or Mac. Large books can take a long time to preview, export, or publish. Use these tips to optimize performance in your books.
Work with images
- Use JPG for opaque raster images and PNG for transparent raster images whenever possible.
- Resize, crop, and rotate images to the desired size and rotation before importing them into iBooks Author.
- If you need to use high-resolution images in your book, wait to add them until your book is near completion.
Publish to the iBooks Store
If most of your readers will be using the original iPad, scale down images in Interactive Image widgets to a width of 2048 pixels and all other images to a width of 1024 pixels.
Preview on iPad, or export for distribution outside the iBooks Store
You can improve the viewing experience on iPad models without Retina display by scaling down images in Interactive Image widgets to a width of 2048 pixels and all other images to a width of 1024 pixels.
Work with movies
- Trim your movies to the desired length before exporting them for use in iBooks Author.
- Learn more about working with movie files in iBooks Author.
Use the 3D widget
See the best practices for using 3D models to learn how to optimize your 3D objects.
- Organize your book into chapters with sections. Avoid creating large sections or chapters.
- Avoid adding too many widgets to a single page.
- iBooks Store will accept books up to 2.0 GB for publication. While you can distribute larger books for free through other channels, keep the size down for best results and to avoid performance issues.
- As an alternative to using the Preview function in iBooks Author, you also can export your book as an iBooks file. Then, copy that file to your iPad through iTunes.