Why is this and what do I need to do to see the preview with the second syntax?
It is a long time ago. First I did it as you expected, but then I realized, that inheritance of previews was doing problems. It was much easier to specify at each level of maps, what should be above and what should be below. Is it doing a huge problem for you?
If I remove the # in the second to last line, then I should see an identical output (with a preview AND passage) offset 200m, but again I get the passage only.
Displaying maps in offset was intended to be used only in very rare cases. I have never thought of displaying also previews in the offset. But I can imagine, that in some cases it would be useful. Probably best solution would be if preview inheritance could be turned on/off by some switch. Would it solve your problems? Regards, S.