Replace Notes When Moving/Copying Across Staves: Score Editor

Hi,

I now how to move and copy midi notes from one staff to another using selection tool and mouse. However, is it possible to replace the target notes. Currently, if there are midi there, I have to delete them first and do copy or move. From manual:

Moving across staves – the Lock button
If you are editing several tracks, you may want to move notes from one staff to another.
PROCEDURE
Make the desired Quantize settings and select the notes. Make sure to only select notes on the same staff.
Make sure that the “L” (Lock) button on the extended toolbar is deactivated .
If this button is activated, you cannot move notes and other objects from one staff to another, which is handy if you need to transpose a note very high or low, for example.
Click on one of the notes and drag them to the new system.
The active staff rectangle indicates on which staff the dragged notes appears.

Any help would be appreciated.

CS