In WF2 youcan set (in the View Properties window) the simmetry line to something else than "Solid line", e.g. to "Symmetry line ISO". If that doesn't work, you could try combining that with the drawing option "line_standard" to "std_din".
With "Symmetry line ISO" the result is yellow half view line with CTRLFONT line style and with "Symmetry line ASME" you get the same line but with two white stripes at the end (simmetry symbol). Edited by: skraba