max Pan Offset Vertical
The maximum vertical pan offset relative to the dimensions of the ReaderView, defined as a CSS string in pixels or percentage.
Example: Setting it to "0%" will not allow the top of the publication to be panned further down than the top of the ReaderView. (and the opposite for the bottom)
Example: Setting it to "50%" will allow the top of the publication to be panned to the midpoint of the ReaderView. (and the same for the bottom)
Example: Setting it to "100%" will allow the publication to be panned all the way outside the ReaderView.
NOTE: This options has no effect if IReaderViewOptions.transformManagerOptions.maxPanOffsetVertical
has been set.