I started with my origin here at X0.Y0.:
Then did Modify -> Move Part Origin... -> Alt-Shift to select the point in the upper left hand corner.
Now my origin is here, and the X and Y extents of my work envelope have changed to reflect that:
Is there a simple way to move the origin back to X0.Y0.?? If not, whats the best way to do it if, as in my case, there is no actual geometry at X0.Y0., i.e. a point.??
Do I need to bisect lines and create mid points or something? That seems like a lot of effort for what appears to be a relatively simple problem.
Thanks