How do I Move Sheet Corner to 0,0 on Existing Drawing?

When I open a sheet tab on an EXISTING drawing and have already set the Print CONFIG for an 8-1/2" x 11" sheet with the Print STYLE I want, but my image is not located correctly where I want it on my 8-1/2" x 11" page that's displayed with a solid line and a dashed line inside, how do I set the lower left sheet corner to 0,0?