I am new to AC coming from MicroStation and I can understand the "basics": like getting tangents at the end of an pre-existing arc? It seems like the tangent snap floats on the arc.... Also, I rotate the view using the DView command/ twist but then ortho is not ortho anymore - and while I rotated the UCS the same amount: it took 2 days to figure out I was not hitting my EaglePoint surfaces anymore...and switched back the UCS... Any help? Sabin