To Create a Surface Trim
The model must contain a quilt for you to create a surface trim.
1. Click > 
Extrude. The Extrude tab opens.
Extrude. The Extrude tab opens.2. You project a sketch normal to the sketching plane onto the quilt to form the trim boundary.
Select a sketch to extrude, or to create a sketch, click the Placement tab, click Define, sketch a section, and click 
OK.
OK. | You could also select a sketch first, or select a datum plane or planar surface first, and then click > Extrude. |
3. To make the extrusion a surface, click 
Surface.
Surface.4. Select a depth option from the menu:
◦ 
Variable. Type a value.
Variable. Type a value.◦ 
Symmetric. Type a value.
Symmetric. Type a value.◦ 
To Next. The extrude will stop at the first surface that it reaches.
To Next. The extrude will stop at the first surface that it reaches.| | This option is not available in Assembly mode. |
◦ 
Through All. The extrude will stop at the last surface it reaches.
Through All. The extrude will stop at the last surface it reaches.◦ 
Through Until. Select a reference surface.
Through Until. Select a reference surface.| | This option is not available in Assembly mode. |
◦ 
To Reference, and then select one of the following options:
To Reference, and then select one of the following options:▪ 
—Extrude to a selected point, curve, plane, surface, quilt, or body.
—Extrude to a selected point, curve, plane, surface, quilt, or body.▪ 
—Extrude to an offset of a selected point, curve, plane, surface, quilt, or body, and then set a value for the offset distance. To flip the offset direction, click 
.
—Extrude to an offset of a selected point, curve, plane, surface, quilt, or body, and then set a value for the offset distance. To flip the offset direction, click .▪ 
—Extrude to a translation of a selected point, curve, plane, surface, quilt, or body, and then set a value for the translation distance. To flip the translation direction, click .
—Extrude to a translation of a selected point, curve, plane, surface, quilt, or body, and then set a value for the translation distance. To flip the translation direction, click .5. To flip the direction of feature creation in relation to the sketching plane, click .
.6. To remove material, click 
Remove Material.
Remove Material.7. Click the Quilt collector, and select a quilt to trim. The sketch is projected to intersect with the quilt.
8. To preview how the quilt will be trimmed, click 
.
.9. To change the portion of the quilt to be removed, click 
to the right of Remove Material. The arrow that lies within the sketching plane points to the side that will be removed. Switch between three modes:
to the right of Remove Material. The arrow that lies within the sketching plane points to the side that will be removed. Switch between three modes:◦ Remove side 1
◦ Remove side 2
◦ Keep both sides
10. If you keep both sides of the quilt, to select the side that will inherit the original quilt ID, click to the right of the Quilt collector.
to the right of the Quilt collector.11. (Optional) The section used for the extrusion is associative with the sketch you selected. To break this associativity and copy the section into the extrusion, click the Placement tab, and then click Unlink.
12. (Optional) To add a taper to the extrude, click the Options tab, select the Add taper check box, and then type a value from -89.9° through 89.9° for the taper angle.
| | You can add a taper to an extrude if the section of the feature is a closed loop. |
13. Click 
OK.
OK.