Before you can use a new vocabulary to classify your content, a new Taxonomy term field must be added to a <a href="@ctedit">content type</a> on its <em>manage fields</em> page. When adding a taxonomy field, you choose a <em>widget</em> to use to enter the taxonomy information on the content editing page: a select list, checkboxes, radio buttons, or an auto-complete field (to build a free-tagging vocabulary). After choosing the field type and widget, on the subsequent <em>field settings</em> page you can choose the desired vocabulary, whether one or multiple terms can be chosen from the vocabulary, and other settings. The same vocabulary can be added to multiple content types, by using the "Add existing field" section on the manage fields page.