Cutting Nodes: Selected nodes can be removed from the net and transferred to the clipboard by choosing Edit → Cut (or pressing ctrl+x, clicking ). They can be removed without placing them in the clipboard by right-clicking and choosing Delete, or simply by just pressing the Delete key.
Alternately, they can be entered into the clipboard without removing them from the net with Edit → Copy (or pressing ctrl+c, or clicking ).
If no nodes are selected when the copy command is done, the whole net will be copied to the clipboard.
Pasting Nodes: Once the nodes are in the clipboard, you can duplicate them into any net by opening the window for that net, optionally clicking in it where you want them to be placed, and then choosing Edit → Paste (or pressing ctrl+v, or clicking ). When copying from one net window to another, the two windows must both be within the same running instance of Netica; if there are two separate instances of Netica running, you can't copy and paste between them.
All links between the transferred nodes, all their properties, and all their CPTs will be maintained during the transfers. Links that enter cut or copied nodes from a node not being cut or copied will appear as disconnected links in the duplicate. Links that go from a cut or copied node to a node not being cut or copied, will not be copied.
Nets may be copied and pasted into other programs, such as Microsoft Word. More Info
Duplicate: If you want to duplicate a large portion of the nodes, choose Window → Duplicate Net (or right-click the net background and choose Duplicate in New Window). In the resultant net, delete any of the nodes you don't want.
Node Names:
Since every node name in a net must be unique, a node’s name must
be changed when duplicating it into a net already having that name. Netica
does this if necessary, by adding a number to the end of the old name,
or incrementing the number if there already is one. Of course node
titles don’t have to be unique, so after duplicating or pasting you may
have several nodes with the same title, which you can change manually.