Use the Instance menu to do the following:
Create instances of parts from the current model and add them to the assembly. You can also create instances of other models to add to the current assembly.
Create a linear pattern of part instances.
Create a radial pattern of part instances.
Translate selected part or model instances along a specified vector.
Translate selected part or model instances along a specified vector until they are a specified distance from another instance.
Rotate selected part or model instances through a specified angle about a specified axis.
Replace a part instance with a second part instance.
Convert any position constraints to an absolute position.
Merge or cut part instances.