Trying to find when this misbehaviour appeared, I re-downloaded/installed
alpha12, beta01, 02, 03, 04, 05 (06),
opened a lot of DXF files and had the chance to finally trace the culpritt.
Load beta03, open the 0110344.DXF file here attached in which you will hide all layers but the 5th.
Autozoon continues to frame the whole drawing and not the small entities carried by Layer5.
You are right, entities lying on layer 0 (that you can't dump contrary to others layers)
are luring the beta03 autozoom.
Note that saving this file under beta03 doeesn't bother beta06 which perfectly handles it.
thus I don't know how and why beta03 added to my CphB-p2 file this parasitic layer
that even beta06 can't ignore...
I feel sorry to put that extra weight on your shoulders (even more so learning that
Dongxu is no longer on the boat).
You perhaps should leave this problem on the roadside and publish
the 2.1 as is , it is so much better than all other LC versions. :)
Following your idea I displayed the construction lines of layer 0
then to be sure to see them all, zoomed out ;
then, not selecting 'all' but only the entities captured by the blue rectangle (left to right selection pointer),
an infinite white line appeared in the line mess.
Deselect all, and precisely erase this weird white line only... BUG KILLED !
Autozoom now works in both drawing and PrintPreview, big relief.
Remains to understand from where is this white line coming
this will be the task of the next white night.
A BIG thanks.
Trying to find out the entity this buggy line has been generated from,
I displaced the whole drawing and discovered the line is not linked to
any entity but to the absolute origin red cross.
Would this suggest I have inherited of this offending line when importing the original
drawing from an unremenbered CAD?
Is there some means to access the bottom layer on which lies the red cross?