I’ve only just discovered this. I wanted to try positioning the entire board, HOever certain connectors need to be in predefined places. So I thought locking them would be the sensible thing to do. However, it has no effect and they are simply moved as if not locked. I could go through and make sure the components in fixed locations are not part of the selected group but that is an operation that gets tedious and is prone to error when done multiple times during the evolution of a design.