Do not constrain the rendering of fixed layout pages to a single orientation.
- Ensure the
rendition:orientationproperty is set to
auto[WCAG 1.3.4 - AA]
Frequently Asked Questions
- Do I have to set the
No. The default setting does not constrain content to a single orientation. You can explicitly set the property to
autoin the package document, but it does not change anything.
EPUB 3 allows authors to lock fixed layout pages to a single orientation — either portrait or
landscape — using the
property. The problem with forcing a single orientation, however, is that it prevents users
who cannot turn their device from being able to read the content.
Users with physical and motor disabilities, for example, cannot always change the orientation of their device. The user may have it attached to a mount that cannot be adjusted, or that the user cannot adjust without assistance.
By default, EPUB 3 fixed layout pages are not orientation constrained. Locking only occurs when the
author explicitly sets the
rendition:orientation property to the value
landscape. Consequently, the simple solution to this WCAG
level AA violation is to not set this property either globally or on specific pages.
- EPUB 3 — Orientation