[docbook-apps] bookmark (left navigation pane) comes as expanded by default on PDF report docbook 1.74.3

[Bela Patel]

Hi,

I am using docbook version 1.74.3. to generate PDF reports.
I have left navigation pane (bookmark) on the report.

This left navigation pane shows all the section and chapter already expanded
when the report is genereted.
How can I make it to generete report so that all the sections comes as
collapsed by default?

Thanks,
Bela.