It is not possible to insert a bookmark inside the textbox in order to create a cross reference. Nor there is a possibility to insert a reference name in its editing box (pencil icon).
Example for the use of this feature: in a book where all the biographical notes are in small boxes throughout the pages, I inserted them as pdf images in the 3.4.5 version. In this way I can give references in other pages, and compose the list in the table of contents with page numbers.
This feature missing, I'm obliged to return to the 3.4.5 version.
Textbox and cross references
Moderators: Eyal Redler, redlers, Ori Redler