import .dxf sketch into SW2010 - how can I make origin near imported sketch and also constrain all?

Hello,

Is there a way when importing a .dxf sketch that once imported, I can designate what point on sketch is at the origin?  I'm having some trouble with importing into SW2010 some Autocad .dxf sketches.  I can bring them in fine, but once in, the origin is way off from where the sketch is on the screen.  I thought I could simply make a point on the sketch coincident with the origin but since nothing is constrained, this can't be done.  Read that I should be able to import the sketch in, then immediately choose tools / relations / constrain all to keep everything locked, but there is no option there from what I see.  I'm attaching two screenshots.  Thanks.

SolidworksSketching