I recently upgraded to the current version of Timeslips and want to adjust the margins on the bill layout.  When I go to Layout Options, Page Orientation and try to change the margins (so that they're wider), I get an error message "Timeslips could not change the margins on the layout; they may already be at their maximum allowable size.  If there are fields on the layout that stretch from the left margin to the right margin, reduce the width of those fields and try again."  

How do I locate the field(s) that stretch from the left margin to the right margin?  I haven't edited a bill layout in years, and that was in a much older version.  The user manual is no help at all for this.  

Many thanks in advance!