When applying an action the modal gives you the options to duplicate a search term as well as edit it. This is great if, for example, you want to add the full term as an Exact match type and an edited version of the term as a Phrase match type.
To duplicate a search term
From the modal, click the kebab menu (three vertical dots) to view the options and select duplicate. This will create another row with the same search term and settings
To edit a search term
From the modal, click the pencil icon next to the search term to edit it. Press Enter, or click away, to save the edited term.
Here are some more search term articles to help you get up and running