On the field that is long, right-click, go to Format Field, and turn on "Can Grow".  This will wrap text and expand the height of the field as needed.  As that expands, the section that it's in will expand.  One caveat, though, is that you can't have any field in the same section but below the one that you want to grow.  In order to have the non-growing field display without being overwritten, it needs to be in a new section under the one with the field that grows.