Part of another thread speaks to the “Print” (that ain’t a ‘print’) for this view mode.
Although Inkscape on Windows had problems finding the avatar & thumbnail image paths for the .svg file, I think that GraphViz handled the .gv image format file better.
The consensus has been that the charts views that Gramps creates generally need some tweaking before committing to a sharable format … like .pdf or printing hardcopy. And there aren’t any hard-and-fast rules for the tweaks that could be built in. It might be some minor re-arranging of boxes or some redacting. But rather than spend a lot of effort building a 2nd-rate graph editor into Gramps, it made more sense to output a file that is usable by a 1st-rate tool for graph editing.
Someone wrote a thread about manually fixing the filepath and another about swapping in filepath to the big thumbnails instead of the lo-res small thumbnails. But I have not re-discovered those threads yet.
found PR#245 : added an option for changing the thumbnail size from normal to large in gvfamilylines.py