Copy command executable in read-only mode

Hi, I notice in IC6 its possible to initiate the copy command in the layout editor even though the cellview is in read-only mode, whereas the stretch or move commands sound a warning when executed in read-only mode. I am finding this troublesome as when have copied a large array and go to paste, its results in having to cancel the command, excape out of the copy command, make the cell editable and start over. Is it possible to make the copy command non-executable in read-only mode?

Thanks