NVivo Sets Screenshots Tutorial
Sets -- provide flexible or temporary groupings of your sources and/or nodes. These shortcuts can be deleted without deleting the original source or node. Also, a set can include any number of sources or nodes and a source or node can belong to multiple sets.
Click on the Sets view. Right click in the white space. Click New Set.
type a Name and Description for your New Set. Click OK.
Once you have created a New Set. Click on the title in the View window. Right click in the white space. Click Add Set Members.
Select project items to include in the Set. Click OK.