Crystal Reports for Rational Application Developer Designer Guide
Moving a section
On the Report Structure Panel, select the section you want to move.
Drag the section to the new location.
Note:
You can only move a section up or down within an area.
The letters that identify the sections describe their relative (as opposed to original) position. Thus, if you move a "C" section up, it becomes a "B" section. It loses its original "C" designation.