After specifying the part to be positioned, Creo Elements/Direct 3D Access gives visual feedback in the form of direction arrows and planes through which the part can be moved (the
3D CoPilot Settings dialog box). The original clicked point is indicated by a large blue dot to let you track back to the starting point. The moving point is indicated by a small yellow dot. As soon as the cursor moves over the original position, the large blue dot changes to a large yellow dot. Once you start dragging, the blue directional lines turn to yellow to indicate that the part has moved from its original position.
1. On the Modeling Commands toolbar, click Position.
2. Specify the part or assembly to move. When an element (such as a face or edge vertex) is selected, the 3D CoPilot is displayed. Depending on the type of selected element, the 3D CoPilot is displayed in different forms which allow different positioning options.
3. Use the 3D CoPilot to drag the part to the desired position. The part that owns the selected element is positioned.
4. If more positioning control options are desired, click the green arrow. The Position dialog box opens. The options are:
Direct: This is the default selection. Click the part to be positioned.
Selected: To move several parts at the same time, select Selected and specify the parts using the Select tool. The reference element you select (for example, Line/Axis) does not need to be one the selected objects.
The following Dynamic Methods are available:
All
The specified object can be dragged along any axis defined by the 3D pointer on the specified face or edge.
Line/Axis
The specified object can be dragged along the axis defined by the specified face or edge.
Plane
The object can be dragged in a plane where the normal to the plane is defined by the specified point:
• Face normal in the case of a plane (including spheres where a normal is drawn at the specified point)
• Axis direction in the case of a cylinder, cone, torus, swept-bspline, and spun-bspline
• Edge tangent in the case of a straight line
• Axis direction in the case of a circle
Rotate
The object can be dragged around an axis defined by the specified face or edge.
Normal
The object can be dragged along an axis that is drawn at right angles to the specified face or edge.
Free
The specified object can be dragged freely around the viewport in directions orthogonal to the current viewing direction. Use the dynamic mouse (Ctrl plus mouse buttons) to give additional dragging directions.
All other geometry, such as freeform faces/edges, cannot be used to define a direction that is normal to a plane.
5. Click to finish the operation, to cancel.
To position a part or assembly by aligning or mating faces
1. On the Modeling Commands toolbar, click Align/Mate. Check the prompt to determine whether you are in align or mate mode.
2. Select the part or assembly to align or mate. The parts which belong to the selected aligned face or mate face are positioned.
3. Click the fixed face. The selected part or assembly is aligned or mated with the fixed face.
4. To switch between align and mate modes, click the green arrow. The Align/Mate dialog box is displayed, with the following options:
Direct: This is the default selection. Click the part to be positioned.
Selected: To move several parts at the same time, select Selected and specify the parts using the Select tool.
Align
Positions the part belonging to the move face so that the move face lies in the same plane as the fixed face with the two normal directions in the same direction
Mate
Positions the part belonging to the move face so that the move face lies in the same plane as the fixed face. The normal direction of the two faces are in opposite directions.
5. Click to finish the operation, to cancel. It may take multiple align or mate operations to achieve the desired position.
Position.
to finish the operation, 
to cancel.