Follow the procedure below to merge multiple contributors into another contributor:
Navigate to the Contributors module. Click the Merge Contributors link in the sidebar.
Select the contributors that are to be merged. These are the source contributors. You can select multiple source contributors by holding the shift or alt keys on your keyboard.
If you would like the source contributors to be deleted after they are merged, check the respective checkbox.
Select the target contributor. This is the contributor that the source contributors will be merged into.
Click the Merge to perform the merge.
