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Bottom Menu Bar (PDF format)
This bar includes settings of TOC, Progress, Layout, Contrast,
Navigation, Split-Views.
TOC
TOC contains Table of Content, Bookmark, Annotation, and
Scribble.
TOC supports three-layer hierarchy. The current layer is
underlined. Jump to the corresponding page when tapping any of
the layers.
Tap on any position out of the TOC to exit.
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