You can move notes in both time and pitch on the matrix editor by either clicking and dragging them with the Move tool, or selecting them and then dragging them with the Select tool.

To copy notes, select them and then use the standard copy and paste functions. After the paste the pasted notes will be selected instead, and you can then drag them wherever you need them. You may also copy notes by selecting them with the Select tool, then keeping Ctrl pressed click-and-drag the selected notes in a new position.