How to show TOC (Index) in DTPO integrated viewer for PDF

Surely answer is in front of my eyes, but I’m not able to find it.

How to open the TOC or Index, in integrated PDF viewer? Sidebar seems to show only thumbnails…

You can’t. Table of contents is currently not a supported feature of the PDF viewer. This may be included in a future release of DEVONthink.

Ok, thanks.