OptionGroup.HideDuplicates Property (Access)
You can use the HideDuplicates property to hide a control on a report when its value is the same as in the preceding record. Read/write Boolean.
The HideDuplicates property applies only to controls (check box, combo box, list box, option button, option group, text box, toggle button) on a report.
The HideDuplicates property uses the following settings.
If the value of a control or the data it contains is the same as in the preceding record, the control is hidden.
(Default) The control is visible regardless of the value in the preceding record.
The DefaultValue property doesn't apply to check box, option button, or toggle buttoncontrols when they are in an option group. It does however apply to the option group itself.
You can set the HideDuplicates property only in report Design view.
You can use the HideDuplicates property to create a grouped report by using only the detail section rather than a group header and the detail section.