The manual will be updated in the next release of NV2 as follows:
Copy This is used to copy a field from one location to another.
NOTE: If you have a block marked when you are doing an Copy the block
will be copied instead of the cell. Clear the block using the Block>Clear
first then Edit>Copy the desired cell.
Append The Block>Append is used to move a marked block of items to the
end of the current document. The block disappears from its original
position, and reappears below the selected line.