From Joomla! Documentation
Below the list of categories is the batch processing section:
- Set Access Level. Use this drop-down list to select an access level.
- Set Language. Use this drop-down list to select a language.
- Select Category for Move/Copy. Use this drop-down list to select a category to move or copy the selected categories to. Use the radio button to select either a move or copy operation.
- Process. Press this button to execute your batch processing settings for the selected categories.
- Clear. Reset your batch processing settings selections.