You use the Duplicate Shared Member dialog box to select a duplicate member to use as the basis for a shared member.
For example, assume that a dimension contains three instances of the member Diet Cola, each under a different parent member. If you tag one of the Diet Cola members as shared, you must identify one of the other Diet Cola members as the basis for the shared member.
The Shared Members column displays the name of the shared member that you are creating.
The Base Members column displays the qualified names of all members in the outline that match the shared member name. In the column, you double-click the duplicate member that you want to be the basis for the shared member. The member that you double-click is added to the Shared Members column.