Duplicate a dimension table Simplify the creation process by duplicating an existing dimension table and modifying it. Click the Designers tab. Expand Dimension Tables. Right-click the dimension table, then select Duplicate Select one of the following: Copy the Dimension Table The new dimension table will be identical to the original dimension table but will not inherit the original references forward. Add a copy after The new dimension table will depend on the original dimension table. Insert a copy before The original dimension table will depend on the new copy of the dimension table. Select a system from the Target system drop-down field. Click OK.