You can break line, arcs, circles, ellipses and polylines. When breaking entities, you must specify two points for the break. To use this tool choose 'Break' from Modify menu bar or select icon from Editing toolbar. By default this option is disable. To make enable you have to select the desire entity.

Steps to Break the Entity :-

Fig 1. Selecting Break point

Fig 2. Entity in Broken Form

In above Figure1  line is an entity which you to broken for that  you have to do all steps as described above and you will get that entity in broken form as shown in fig. 2.

See Also