If as you say it is impossible to set the coordinate origin,
I think it would be worth making this a bit clearer in the
Document Properties window -- it seemed natural to me that
if you change the grid origin (and hence the rulers are
changed), that the coordinates would be changed to be
relative to this ruler.
If as you say it is impossible to set the coordinate origin,
I think it would be worth making this a bit clearer in the
Document Properties window -- it seemed natural to me that
if you change the grid origin (and hence the rulers are
changed), that the coordinates would be changed to be
relative to this ruler.