Good afternoon, I did a Save As to make a copy of a model and also a drawing. I made the changes needed on the model and saved it. Then I tried to open the copied drawing and the References button is grayed out and so I try to close SW2008 and restart it and I got the same results. I used to change the references of the copied drawing in SW2006, but I can not do it now. My question is how do I change the reference of a drawing in SW2008? Thanks you in advance for any help on this question.