I know there are a few out there that work, some that are half assed.. you
can do the following at the command prompt quite effectively:
change<enter> P for properties<enter> E for elev<enter> 0<enter>
not seeing the file you're in makes me ask a silly question.
if the previous draftsman was using ELEVATION to separate his drawing
rather than layers you might also be dealing with blocks. seems like
xrefs might be handled the same way for this purpose.
but just to remind you, if the insertion point of a block is already in
the zero plane and the entities IN THE BLOCK are not you need to do
something more than change the elevation of the block to zero.
otherwise, good luck. I hate working in other peoples' drawings when
other peoples' standards suck. worse when "other people" is the
government, and they are trying to make a career out of a set of
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