Thanks for the help!
For information, the diagram is a SysML 1.3 Requirements diagram, and it seems as if I can't set the
diagram frame to non-printable? If I right-click on one of the requirements in the diagram, there is a "Behavior" sub-menu where I can toggle "Printable", but the diagram frame does not seem to be possible to (select and) right-click.
Also tried the exclude filter: in the "Generate Documentation" dialog, under "Exclude filters", I selected "Exclude details for" "Diagram frame" but that didn't help.
I can achieve what I want by selecting "Hide diagram frame" in each diagram, but I have
a lot of diagrams...
(I still think it seems strange that the diagram
frame should be considered to be an element in the diagram. Intuitively, it feels as if the frame IS the diagram, not an element in it.
)