Predefined option sets are sets of options that are used often when creating a form. Some examples might be Colors, Sex, Yes/No answers, etc. Predefined option sets are created when adding or editing a form element that can contain options. These elements are Dropbox, Radio Button, Multiple Select, and Checkbox. See step 10 for any of the mentioned elements for more details on actually saving predefined option sets. There is currently no method for administrating or deleting predefined option sets.