Manipulate bookmarks of pdf files without expanding it?

Question

I have downloaded many PDF files, some without bookmarks. Usually I add bookmarks for these PDF files manually, with Foxit PDF reader

But once I add the bookmark, the bookmark of the PDF file would unfold from top to bottom the next time I open it.

So how do I add/edit bookmarks of the PDF file without unfolding it? Is there a way to do this with Foxit reader, or will I have to use another program?

Answer 1

The link tools in PDF-Xchangeviewer work just fine for me.

a free and portable version is available.