You can segment a new or existing section. 
-  Do one of the following: 
- Sketch a section or select an existing section. 
 
- Place an elevation symbol in a view (or use an existing elevation icon), and click the arrowhead of the elevation symbol to view the clip plane. 
 
  
- Click Modify | Views tab
Section panel
 (Split Segment).  
Note: For illustration purposes, the images in the following steps are for a section. 
 
- Place the cursor on the line at the point it is to be segmented, and click. 
 
 
- Move the cursor to the side of the split to move, and move the cursor in a direction orthogonal to the view direction. 
 
 
- Click to place the segment. 
 
 
The new segmented line has several controls on it. Controls for resizing the crop region display as a dashed green line. All segments share the same far clip plane. 
There are controls for moving the segments of the line. 
For segmented sections only: There is also a break control that divides the section into smaller segments. The break control displays as a Z on the section line. Click it to break up the section even further. When you do, the section has more controls for resizing segments.