Bevel
Bevel 
- creates a bevel between two segments. If the segments intersect - superfluous parts are automatically cut off after the use of this tool. If the line segments do not intersect, the segments can be extended.
Select the first line segment and press Bevel button on the toolbar or select Tools -> Modify -> Bevel menu item. Select the second line segment.
Example 1: intersecting lines
before: 
after: 
Example 2: non intersecting lines
before: 
after: 
Note: bevel's value is available for changing:
| • | select the first line segment; |
| • | press Bevel button; |
| • | place mouse cursor over the drawing field; right part of the status bar shows the current bevel value  (physically this is the distance from the intersection point to the sections' cut off points) |
| • | delete the current value using Backspace key and set the new one; |
| • | press Enter key; |
| • | select the second line segment. |