A customer asked exactly how one can change the default gridsize of 8 x 8 pixels to a different value in order to make it easier for him to move and place small ReportItems on the design surface. I had no clue! VS gives you some options for a Windows Form app, but these didn't affect the Report Designer add-in.
Turns out, you need to use the GridSpacing property of the report you're working with:
1. Open your report in design view
2. At the top of the Properties window, choose your Report item from the combo-box which lists objects ion the report.
3. Modify the GridSpacing property.