[therion] section lines

[Martin Budaj]

>> I guess that type section for lines only sets a concrete line width,
>> and may be sets it not to be clipped, but it would be all. Rigth?


If the line has control points (it's an arc not a segment) it is drawn in
a special way where the middle part (which crosses the passage) is omitted
(thbook footnote 15). Optionally you may specify direction arrows using
direction option.

>> I wonder wether these nice section lines I have seen, wich have an
>> arrowhead are made ex profeso (type arrow, -clip off or so) or are
>> pre-built.


-direction begin, see above

Martin