To Merge Surfaces
Select two quilts to merge and click > 
Merge. Click References to display the names of the selected quilts.
Merge. Click References to display the names of the selected quilts.For more information about merging two surfaces or quilts, refer to the topic About the Merge Feature from the Part Modeling module of the Creo Help.
 | • The surface intersection is removed if any of the parent quilts is modified in a way that leads to the failure of the merge operation (for example, if the edge of the quilt is extrapolated in such a way that it no longer intersects, the subsequent surface intersection is removed). • The primary quilt becomes the parent quilt for the merge feature. |