THANKS FOR THE REPLY.
Your method is good, but there is a problem. When you have a long piece and you make a "detail view" in a extreme of it, if you make a "broken wiew" before the long element converts into a short element but the detail view´s balloon remains in the original position!!.The only way that i found to solve it is to eliminate the detail view´s balloon and to draw a circle and a lead line similar.
regards