Boundary LifeLine horozontal line

Is it possible to “shorten” the horizontal Boundary LifeLine’s line?

I have seen some diagrams with short line but can’t find the way to do it in VP.
http://img401.imageshack.us/img401/6243/examplexu.jpg

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Hello pavlosgr,

Can you upload the image directly in the post?

Best regards,
Rain