Move or copy existing nodes at equal or unequal spacings.
From the Main
Menu select Model > Nodes > Translate.
Select Geometry
> Nodes > Translate in the Menu tab of the Tree Menu.
Click Translate Nodes in the Icon Menu.
Shortcut key:
[Ctrl]+[Alt]+3
Click to the right of Translate Nodes: Display the Node Table
Start Node Number
Enter a starting node number for the newly
created nodes. This number is auto-set to the largest node number in use
+1. To modify this item, click and select an option to specify
a desired number.
Mode
Copy:
To copy nodes
Move:
To move nodes
Translation
Equal Distance
To copy (or move) at an equal spacing
dx, dy, dz
Copy (or move) distance in each axis direction
To enter the copy (or move) distance, type
in each distance, or click the entry field and assign the copy (or move)
distance in the working window with the mouse.
Number of
Times: Number of repetitions
Unequal
Distance
To copy nodes at unequal spacings
Axis:
Assignment field for copy direction
x:
To copy nodes at unequal distances in the UCS x-direction
y:
To copy nodes at unequal distances in the UCS y-direction
z:
To copy nodes at unequal distances in the UCS z-direction
Arbitrary:
To copy nodes at unequal distances in an arbitrary direction
Distances:
Enter unequal copy distances in the assigned direction as many times as
desired
Direction Vector: If the direction is selected arbitrarily,
enter the components of the direction vector in each of the x, y, z-directions
Merge Duplicate
Nodes
Merge overlapping nodes to single nodes if new nodes coincide with existing
nodes. Click to modify the Merging Tolerance if necessary.
Copy Node
Attributes
Select the option whether to copy the attributes (nodal boundary conditions,
nodal concentrated loads, etc.) to the nodes being copied. Click to assign desired attributes selectively.
Intersect
Frame Elements
Select the option whether to divide the existing line (beam & truss)
elements at the newly created nodes that intersect the elements. Click
to modify the Intersecting Tolerance if necessary.
Translate Nodes
to the right of 
Start Node Number
dx, dy, dz