I am new to SolidWorks after using ProE. I design check fixtures for automotive parts. I have created a start assembly that has my base and bunch of attached components to it that are used in every design. When I place my math data (the automotive part) in my assembly and move it above my base feature in the tree, I want to then move my base in relation to the math data but it says that it is already fixed. How do I make it so I can move my base to where ever I want it to be in XYZ?