When editing text it appears to be automatically wrapping even when the Line Length value is not exceeded
The text was placed with the Word Wrap Method. This method allows you to contain text within a box, once a box is identified. If a word is entered that exceeds the limit of the box, that word drops to the next line.
http://communities.bentley.com/products/microstation/w/microstation__wiki/15989.how-do-you-change-the-line-length-setting-for-a-placed-text-a-node-in-microstation-v8i
Castellano