121 provides several easy ways to add new top and child level terms.
This short video demonstrates adding a new top term and a new child/narrower term to an existing structure. To view full screen use the expander button at the bottom left for Windows and Android or top right for Apple products.
Download video: mp4 file
Click on the link to view a similar video to Rename Terms
Click on the link to view a similar video to see Hierarchy Builder using local terms.