To
delete a tag from the Tags panel, drag it to the Delete icon at
the bottom of the panel. If the tag has been applied to content,
an alert message appears. Select another tag to replace the deleted
tag and click OK.
To delete all unused tags, choose Select All Unused Tags
from the Tags panel menu, and then click the Delete icon at the
bottom of the panel.
Note: Tags that were loaded with a DTD file
cannot be deleted until the DTD file is deleted.