Adrian, at
present, we don’t have support for “Programmatically
show the bookmark pane of PdfViewer”. While implementing this
feature we will consider your UI option. Also,
we do not have any immediate plans to implement this feature and at the
planning stage for every release cycle, we review all open features and
identify features for implementation based on specific parameters including
product vision, technological feasibility, and customer interest.
We will let you know when this feature is implemented.
You can track the status of this feature from below link,
https://www.syncfusion.com/feedback/42337/support-to-expand-the-bookmark-pane-in-the-code-behind
