1. From Setup, enter Data Category in the QuickFind box, then select Data Category Setup.
2. Hover your cursor over the category group name.
3. Click the Delete Category Group icon ().
4. Select the checkbox in the confirmation dialog, then click OK.The data category group is deleted. Continue to step 5 if you wish to restore the datacategory group.
5. In the Removed Category Groups section, hover your cursor over the category groupname.
6. Click the Undelete Category Group icon ().The category group moves to the Category Groups section as an inactive category group, andassociations with articles, questions, and visibility are restored.