Inserts a new folder below the active folder or as a sibling of the currently selected
rule (that is, in the same folder where the selected rule appears). If you select
an open folder, the software creates the new folder inside the selected folder.
The software assigns a default name of New Folder n to the new folder. The letter n represents the next unused, sequential number. For example, if the last folder that you added was 15, after you select the New Folder command, the software creates a new folder with the name New Folder 16.