Line Trim Mode
The Line Trim mode splits 2D objects, NURBS curves/surfaces, solids, and viewports along a cutting line; it keeps a specified side, and trims away the other side.
To trim only the selected object, press the Alt (Windows) or Option (Macintosh) key while drawing the trim line.
 
1.
Click the Split tool from the Basic palette.
2.
Click the Line Trim mode from the Tool bar.
3.
4.
The object is split by the line, and the indicated side remains.

Editing 2D Objects : Splitting Objects and NURBS Surfaces : Line Trim Mode

Nemetschek NA
Phone: 410.290.5114
Fax: 410.290.8050