Thank you for the reply.

I think I wasnt clear on the first post. I will give an example so someone could follow it and see what I am doing wrong.

Here is the simplified example:
I am trying to make a square frame out of 4 rectangles(frame will have a thickness too). The reason I want to use a layout sketch is I want to be able to change the dimensions of the frame without changing each part. Each of the 4 rectangles is unique so I need 4 different parts. The reason why I want 4 parts is that so in reality I can build each of the parts seperately and then put them together.

I created my layout so that the frame would maintain it shape using a 3D sketch in an assembly. I created a new part with the same shape as one of the rectangles in the layout and inserted in the layout. This is the point where I have my problem.

I can mate the part to the frame but when I change a layout dimension the part does not change with it. I am thinking I need to add a relation to the part and the layout sketch. I tired editing the part but it will not allow me to select a line from the layout sketch and part sketch to add an relation.