Debugging your Report Design Document
Tips to help you debug issues you may have with your report design.
Using a Background Color
To check for overlap of an object on a report design, or to simply visually see where an object falls on your report, set the Background Color property of the object.
Using GREDEBUG environment variable
Set GREDEBUG to check overfull boxes. Warning messages regarding any overfull boxes are written to standard output.