@Anonymous wrote:
I have a point on the drawing with a coords that I want to change but also have my usc origin at the same point.
You can MOVE everything in the drawing from that known point to the coordinate location where you want that to be. However, a UCS origin, as already mentioned, can't be anything other than 0,0,0 within itself [that's what "origin" means, after all].
But if it will suit your needs, you can set the SNAPBASE System Variable to that point, so that even though it's not 0,0,0, that point can serve as the origin for certain things -- positional Snap locations will be measured from there, in older versions Grid lines or dots will be spaced from there [not true in Acad2016 here, for some reason, though Help still describes it as for both the Snap and Grid origin], Hatch pattern origins will be generated from there [unless you specify a different origin in newer versions], etc.
If you want this for Ordinate Dimensions, you can draw them, and then select them and drag their origin-point grips from the origin when they were drawn to that location, and their text content will then show the X or Y distance measured from there. But I haven't found a way to set an ordinate-origin location other than the current UCS's 0,0 for Ordinate Dimensions in the initial drawing of them.
Kent Cooper, AIA