About Selecting References for Dowel Pins
Use the Select References dialog box to define all placement references required for the dowel pin fastener. One arrow indicates the orientation and the position of the dowel pin fastener.
1. Click Tools > Intelligent Fastener and then click one of the following:
Assemble on reference
Assemble by mouse click
The Select References dialog box opens and the Position Reference collector is activated.
2. Select the reference as is described below:
If you clicked Assemble on reference, select the position point, axis, or cylindrical surface.
If you clicked Assemble by mouse click, select the first and second dimension reference.
The Placement SurfaceDowel Pin collector is activated.
3. Select the placement surface for the dowel pin.
* 
—Indicates that a nonsolid surface is selected. If Creo Intelligent Fastener cannot find a solid surface at the same location, the hole is not created. Best practice is to select a solid surface.
—Indicates that the part cannot be changed.
4. Click OK to finish selecting the dowel pin references. The Dowel Pin Fastener Definition dialog box opens.
5. Click Cancel to close the Select References dialog box.