About the Trim Feature
Use the Trim tool to cut or split a quilt or curve. You can remove material from quilts or curves to create a certain shape, or to split material.
To access the Trim tool, click > 
Trim. Select a quilt or curve to trim, and then specify the trimming object. You can specify and change the trimming object during creation or redefinition.
Trim. Select a quilt or curve to trim, and then specify the trimming object. You can specify and change the trimming object during creation or redefinition.A quilt is a collection of surfaces. Trim a quilt using these trimming objects:
• Trim at an intersection with another quilt or datum plane
• Use a datum curve that lies on a quilt
Trim a curve by clipping or splitting the curve at the point of an intersection with a surface, another curve, or datum plane.
During the trimming process, you can specify which part of the trimmed quilt or curve you want to keep. When you trim a quilt with another quilt, you can use Thicken trim. Thicken trim allows you to specify trim thickness dimensions and control fitting requirements for surfaces.