In the proporsal "Charter Proposal: Advanced/Hybrid Layouts", I found :
"When the device characteristics change dynamically (e.g. orientation change by the user), it is possible for a Reading System to change rendering to use a rendition that better fits the new circumstances, without losing the current reading position"
http://www.idpf.org/charters/2012/layout/ahl.html#h.eub0wrqgo7eg
Is there any device or reading system implementing this function?
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