This command will force a break where all lines and polylines cross the "break" polyline. In addition to breaking lines and polylines, you can also put the segments to new layers based on whether the segments are inside or outside the break polyline. Polylines with arc segments are not handled. To reconnect the broken lines and polylines, use the Join Nearest command.
1 Select the clip edge polyline: pick a closed polyline
2 Select the polylines and lines to be clipped.
Select Objects: pick the entities to break
3 Specify layer names for Inside segments (Yes/<No>)? Yes
4 Enter a layer name for the Inside segments <0>: Press Enter
5 Specify layer names for Outside segments (Yes/<No>)? Yes
6 Enter a layer name for the Outside segments <0>: Final