If no fields exist, those categories will be hidden in the
Review Tree
tab. In other words, categories which have a zero (in brackets) next to them will be hidden, and categories which have a number (in brackets) next to them will be visible. The number denotes the number of fields present for that category. However, this feature doesn't apply to all review nodes. For nodes that display the
Mark all Workpaper(s) as Reviewed
/
Mark all Workpaper(s) as Unreviewed
in the shortcut menu, the option will be visible.