How come bar codes in Adobe forms do not have expand to fit settings?

When creating bar codes in layout view of the LiveCycle Designer code 3 of 9 bar codes objects do not support automatic expansion. You have to manually set the length of the bar code. The bar code fills the predetermined length regardless of content. This prevents you from being able to have a consistent bar code compression ratio. Is there a way to define compression ratio and set the bar code to expand to fit so the length will vary depending on content.

Thanks.