Hi,
With the Notes and Rests tab clicked (to make sure you're copy/pasting notes and not just a MIDI graph):
1. You can use Region Select to select the measures you want to copy.
2. Then Edit/Copy (or "Ctl + C") to copy the selection to your computer clipboard.
3. Now select the Region you want to paste those notes into.
4. Edit/Paste (or "Ctl+V") to paste the notes in.
You can read about selecting a Region by using Help/Users Guide, and then the Index to look up "region" and then double-click the "selecting" subtopic. You can also take a look at the free Tutorial Videos at
http://www.notation.com/vb-forum/showthread.php?t=3980
Enjoy!
Sherry