Modifying the Display Order of the Report DataSet Columns
Once the Report DataSet Definition tree is defined you can modify the Report DataSet column display order.
To modify the display order of the Report DataSet:
1. Access the Report DataSet Definition properties.
2. Select Definition.
3. In the bottom list tool bar, click Reorganize 
.
.4. Select the items (representing the columns) you want to move and drag and drop them where you want.
5. Click OK.