Is it the difference between the two syntax' mapname [x y] below, and preview below mapname? Is one preferred over another?
It is different:
mapname [x y] below, and
will generate a map (named mapname) shifted x y and on the original place only "below" preview of mapname will be displayed.
preview below mapname?
will generate only the preview, "mapname" will not be displayed.
I have never thought of displaying also previews in the offset. But I can imagine, that in some cases it would be useful.
Is that not what the m123 example is doing?
No, because there the preview is just caused by another offset, not "preview" option in the map.
Probably best solution would be if preview inheritance could be turned on/off by some switch. Would it solve your problems?
Yes, depending on the problems it might cause :) I am hoping that the preview (very large) extent will be clipped by the extent of the (smaller) offset passage.
OK, I will put it on the TODO list. May be it will not be too complicated... Regards, S.