Move single part in assembly

I have 3 parts drawings in an assembly drawing. I already positioned all the three together using the mate tool. But I need to move only two of them one inch. I tried to position the parts exactly where I wanted them using the mate tool, but I could not find how. Now that the parts are together only the whole things move using the move component. How can I move only the part I want and exactly the distance I need. Thank you.

SolidworksAssemblies