Grid Options are located in the IDE menu by selecting the Tools Options menu item. In the Options dialog, slect the Forms Designer option, and the Grid Options setting as shown below:
This allows you to set the spacing between grid points. When you place a new control in the report, you can then optionally force it to the grid points with the Report Designer Format Align To Grid command. You can also simply right-click on the control and select the Align to Grid popup menu item.
Set the spacing by typing in values for the Width and Height spacing. The measurement units depend on the default for the report, as set in the Report Properties dialog. The Grid Options dialog tells you the minimum value ( 1/20th inch, or 2 millimeters).
The Snap Lines option places the control in alignment with other controls using line indicators as shown below: