I am creating a wiring diagram in a drawing, no model views. I have created my blocks representing the components, terminal boards, etc., and placed them on the sheet. I can't find any way to lock the blocks in position with dimensions to some fixed point. When I place the lines representing the wire runs and try to space them esthetically with dimensions, the line that I am trying to move with a dimension stays fixed, and all the blocks that are connected with existing wire runs, move. Is this expected behavior? How can I fix the blocks in position on the drawing sheet? Should I be doing this in a model sketch instead of on a drawing sheet?